51557433 has 16 divisors (see below), whose sum is σ = 71769600. Its totient is φ = 32883840.

The previous prime is 51557423. The next prime is 51557501. The reversal of 51557433 is 33475515.

It is not a de Polignac number, because 51557433 - 2⁴ = 51557417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51557394 and 51557403.

It is not an unprimeable number, because it can be changed into a prime (51557423) 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, 5163 + ... + 11391.

It is an arithmetic number, because the mean of its divisors is an integer number (4485600).

Almost surely, 2^51557433 is an apocalyptic number.

It is an amenable number.

51557433 is a deficient number, since it is larger than the sum of its proper divisors (20212167).

51557433 is a wasteful number, since it uses less digits than its factorization.

51557433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352.

The product of its digits is 31500, while the sum is 33.

The square root of 51557433 is about 7180.3504789112. The cubic root of 51557433 is about 372.1891958751.

The spelling of 51557433 in words is "fifty-one million, five hundred fifty-seven thousand, four hundred thirty-three".