51032001531 has 48 divisors (see below), whose sum is σ = 83996157600. Its totient is φ = 27384053760.

The previous prime is 51032001511. The next prime is 51032001547. The reversal of 51032001531 is 13510023015.

It is not a de Polignac number, because 51032001531 - 2¹⁹ = 51031477243 is a prime.

It is a super-2 number, since 2×51032001531² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51032001498 and 51032001507.

It is not an unprimeable number, because it can be changed into a prime (51032001511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1099311 + ... + 1144791.

It is an arithmetic number, because the mean of its divisors is an integer number (1749919950).

Almost surely, 2^51032001531 is an apocalyptic number.

51032001531 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51032001531 is a deficient number, since it is larger than the sum of its proper divisors (32964156069).

51032001531 is a wasteful number, since it uses less digits than its factorization.

51032001531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45964 (or 45957 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 51032001531 its reverse (13510023015), we get a palindrome (64542024546).

The spelling of 51032001531 in words is "fifty-one billion, thirty-two million, one thousand, five hundred thirty-one".