51043557 has 16 divisors (see below), whose sum is σ = 71928000. Its totient is φ = 32108544.

The previous prime is 51043513. The next prime is 51043561. The reversal of 51043557 is 75534015.

It is not a de Polignac number, because 51043557 - 2⁶ = 51043493 is a prime.

It is a super-2 number, since 2×51043557² = 5210889422424498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51043957) 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, 13669 + ... + 16997.

It is an arithmetic number, because the mean of its divisors is an integer number (4495500).

Almost surely, 2^51043557 is an apocalyptic number.

51043557 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51043557 is a deficient number, since it is larger than the sum of its proper divisors (20884443).

51043557 is a wasteful number, since it uses less digits than its factorization.

51043557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 51043557 is about 7144.4773776673. The cubic root of 51043557 is about 370.9485207910.

The spelling of 51043557 in words is "fifty-one million, forty-three thousand, five hundred fifty-seven".