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245351253 = 37671031693
BaseRepresentation
bin11101001111111…
…00001101010101
3122002200010122110
432213330031111
51000302220003
640202421233
76036310530
oct1647741525
9562603573
10245351253
11116549034
126a201819
133baa5774
1424829a17
1516816a03
hexe9fc355

245351253 has 32 divisors (see below), whose sum is σ = 383358976. Its totient is φ = 136686528.

The previous prime is 245351251. The next prime is 245351269. The reversal of 245351253 is 352153542.

It is not a de Polignac number, because 245351253 - 21 = 245351251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245351253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245351251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144075 + ... + 145767.

It is an arithmetic number, because the mean of its divisors is an integer number (11979968).

Almost surely, 2245351253 is an apocalyptic number.

It is an amenable number.

245351253 is a deficient number, since it is larger than the sum of its proper divisors (138007723).

245351253 is a wasteful number, since it uses less digits than its factorization.

245351253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873.

The product of its digits is 18000, while the sum is 30.

The square root of 245351253 is about 15663.6921892637. The cubic root of 245351253 is about 626.0313663440.

The spelling of 245351253 in words is "two hundred forty-five million, three hundred fifty-one thousand, two hundred fifty-three".

Divisors: 1 3 7 21 67 103 201 309 469 721 1407 1693 2163 5079 6901 11851 20703 35553 48307 113431 144921 174379 340293 523137 794017 1220653 2382051 3661959 11683393 35050179 81783751 245351253