51531000433 has 16 divisors (see below), whose sum is σ = 57204921600. Its totient is φ = 46022974480.

The previous prime is 51531000413. The next prime is 51531000473. The reversal of 51531000433 is 33400013515.

It is a cyclic number.

It is not a de Polignac number, because 51531000433 - 2⁵ = 51531000401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51531000398 and 51531000407.

It is not an unprimeable number, because it can be changed into a prime (51531000413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1026210 + ... + 1075252.

It is an arithmetic number, because the mean of its divisors is an integer number (3575307600).

Almost surely, 2^51531000433 is an apocalyptic number.

It is an amenable number.

51531000433 is a deficient number, since it is larger than the sum of its proper divisors (5673921167).

51531000433 is a wasteful number, since it uses less digits than its factorization.

51531000433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50732.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 51531000433 its reverse (33400013515), we get a palindrome (84931013948).

The spelling of 51531000433 in words is "fifty-one billion, five hundred thirty-one million, four hundred thirty-three", and thus it is an aban number.