245155023531 has 24 divisors (see below), whose sum is σ = 395288726976. Its totient is φ = 145123478640.

The previous prime is 245155023527. The next prime is 245155023559. The reversal of 245155023531 is 135320551542.

245155023531 is a `hidden beast` number, since 2 + 4 + 51 + 5 + 50 + 23 + 531 = 666.

It is not a de Polignac number, because 245155023531 - 2² = 245155023527 is a prime.

It is a super-2 number, since 2×245155023531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245155023521) 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 23 ways as a sum of consecutive naturals, for example, 28790085 + ... + 28798598.

It is an arithmetic number, because the mean of its divisors is an integer number (16470363624).

Almost surely, 2^245155023531 is an apocalyptic number.

245155023531 is a deficient number, since it is larger than the sum of its proper divisors (150133703445).

245155023531 is a wasteful number, since it uses less digits than its factorization.

245155023531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57588743 (or 57588740 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 245155023531 in words is "two hundred forty-five billion, one hundred fifty-five million, twenty-three thousand, five hundred thirty-one".