51426531 has 18 divisors (see below), whose sum is σ = 80438748. Its totient is φ = 31646160.

The previous prime is 51426511. The next prime is 51426533. The reversal of 51426531 is 13562415.

51426531 is a `hidden beast` number, since 5 + 1 + 4 + 2 + 653 + 1 = 666.

It is not a de Polignac number, because 51426531 - 2¹⁴ = 51410147 is a prime.

It is a super-2 number, since 2×51426531² = 5289376181387922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51426495 and 51426504.

It is not an unprimeable number, because it can be changed into a prime (51426533) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15385 + ... + 18426.

Almost surely, 2^51426531 is an apocalyptic number.

51426531 is a deficient number, since it is larger than the sum of its proper divisors (29012217).

51426531 is a wasteful number, since it uses less digits than its factorization.

51426531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33843 (or 33827 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51426531 is about 7171.2293925100. The cubic root of 51426531 is about 371.8739383817.

Adding to 51426531 its reverse (13562415), we get a palindrome (64988946).

The spelling of 51426531 in words is "fifty-one million, four hundred twenty-six thousand, five hundred thirty-one".