245232251 has 4 divisors (see below), whose sum is σ = 267526104. Its totient is φ = 222938400.

The previous prime is 245232209. The next prime is 245232283. The reversal of 245232251 is 152232542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245232251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245232251.

It is not an unprimeable number, because it can be changed into a prime (245234251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11146910 + ... + 11146931.

It is an arithmetic number, because the mean of its divisors is an integer number (66881526).

Almost surely, 2^245232251 is an apocalyptic number.

245232251 is a deficient number, since it is larger than the sum of its proper divisors (22293853).

245232251 is a wasteful number, since it uses less digits than its factorization.

245232251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22293852.

The product of its digits is 4800, while the sum is 26.

The square root of 245232251 is about 15659.8930711547. The cubic root of 245232251 is about 625.9301359221.

Adding to 245232251 its reverse (152232542), we get a palindrome (397464793).

The spelling of 245232251 in words is "two hundred forty-five million, two hundred thirty-two thousand, two hundred fifty-one".