51571528431 has 8 divisors (see below), whose sum is σ = 69010277424. Its totient is φ = 34256899200.

The previous prime is 51571528417. The next prime is 51571528433. The reversal of 51571528431 is 13482517515.

51571528431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51571528431 - 2⁹ = 51571527919 is a prime.

It is a super-2 number, since 2×51571528431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51571528433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31028970 + ... + 31030631.

It is an arithmetic number, because the mean of its divisors is an integer number (8626284678).

Almost surely, 2^51571528431 is an apocalyptic number.

51571528431 is a deficient number, since it is larger than the sum of its proper divisors (17438748993).

51571528431 is a wasteful number, since it uses less digits than its factorization.

51571528431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62059881.

The product of its digits is 168000, while the sum is 42.

The spelling of 51571528431 in words is "fifty-one billion, five hundred seventy-one million, five hundred twenty-eight thousand, four hundred thirty-one".