51957543 has 32 divisors (see below), whose sum is σ = 78423552. Its totient is φ = 30326400.

The previous prime is 51957511. The next prime is 51957551. The reversal of 51957543 is 34575915.

It is not a de Polignac number, because 51957543 - 2⁵ = 51957511 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51957553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106446 + ... + 106932.

It is an arithmetic number, because the mean of its divisors is an integer number (2450736).

Almost surely, 2^51957543 is an apocalyptic number.

51957543 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51957543 is a deficient number, since it is larger than the sum of its proper divisors (26466009).

51957543 is a wasteful number, since it uses less digits than its factorization.

51957543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its digits is 94500, while the sum is 39.

The square root of 51957543 is about 7208.1580865017. The cubic root of 51957543 is about 373.1495039027.

The spelling of 51957543 in words is "fifty-one million, nine hundred fifty-seven thousand, five hundred forty-three".