245656031 has 4 divisors (see below), whose sum is σ = 256336752. Its totient is φ = 234975312.

The previous prime is 245656009. The next prime is 245656049. The reversal of 245656031 is 130656542.

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

It is a cyclic number.

It is not a de Polignac number, because 245656031 - 2¹⁸ = 245393887 is a prime.

It is a super-3 number, since 3×245656031³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245656531) 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 3 ways as a sum of consecutive naturals, for example, 5340326 + ... + 5340371.

It is an arithmetic number, because the mean of its divisors is an integer number (64084188).

Almost surely, 2^245656031 is an apocalyptic number.

245656031 is a deficient number, since it is larger than the sum of its proper divisors (10680721).

245656031 is a wasteful number, since it uses less digits than its factorization.

245656031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680720.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 245656031 is about 15673.4179743922. The cubic root of 245656031 is about 626.2904800773.

The spelling of 245656031 in words is "two hundred forty-five million, six hundred fifty-six thousand, thirty-one".