245204101531 has 4 divisors (see below), whose sum is σ = 245207414592. Its totient is φ = 245200788472.

The previous prime is 245204101501. The next prime is 245204101547. The reversal of 245204101531 is 135101402542.

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-245204101531 is a prime.

It is a super-2 number, since 2×245204101531² (a number of 24 digits) contains 22 as substring.

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 245204101531.

It is not an unprimeable number, because it can be changed into a prime (245204101501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1542916 + ... + 1694401.

It is an arithmetic number, because the mean of its divisors is an integer number (61301853648).

Almost surely, 2^245204101531 is an apocalyptic number.

245204101531 is a deficient number, since it is larger than the sum of its proper divisors (3313061).

245204101531 is an equidigital number, since it uses as much as digits as its factorization.

245204101531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313060.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 245204101531 in words is "two hundred forty-five billion, two hundred four million, one hundred one thousand, five hundred thirty-one".