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253813 = 7101359
BaseRepresentation
bin111101111101110101
3110220011111
4331331311
531110223
65235021
72104660
oct757565
9426144
10253813
1116376a
12102a71
138b6b1
14686d7
155030d
hex3df75

253813 has 8 divisors (see below), whose sum is σ = 293760. Its totient is φ = 214800.

The previous prime is 253811. The next prime is 253819. The reversal of 253813 is 318352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253813 - 21 = 253811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528 + ... + 886.

It is an arithmetic number, because the mean of its divisors is an integer number (36720).

2253813 is an apocalyptic number.

It is an amenable number.

253813 is a deficient number, since it is larger than the sum of its proper divisors (39947).

253813 is a wasteful number, since it uses less digits than its factorization.

253813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467.

The product of its digits is 720, while the sum is 22.

The square root of 253813 is about 503.7985708594. The cubic root of 253813 is about 63.3147098212.

The spelling of 253813 in words is "two hundred fifty-three thousand, eight hundred thirteen".

Divisors: 1 7 101 359 707 2513 36259 253813