51524042531 has 4 divisors (see below), whose sum is σ = 55487430432. Its totient is φ = 47560654632.

The previous prime is 51524042461. The next prime is 51524042533. The reversal of 51524042531 is 13524042515.

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-51524042531 is a prime.

It is a super-2 number, since 2×51524042531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51524042533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1981693931 + ... + 1981693956.

It is an arithmetic number, because the mean of its divisors is an integer number (13871857608).

Almost surely, 2^51524042531 is an apocalyptic number.

51524042531 is a deficient number, since it is larger than the sum of its proper divisors (3963387901).

51524042531 is a wasteful number, since it uses less digits than its factorization.

51524042531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963387900.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 51524042531 in words is "fifty-one billion, five hundred twenty-four million, forty-two thousand, five hundred thirty-one".