51899057 has 4 divisors (see below), whose sum is σ = 59313216. Its totient is φ = 44484900.

The previous prime is 51899039. The next prime is 51899069. The reversal of 51899057 is 75099815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51899057 - 2⁶ = 51898993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51898999 and 51899017.

It is not an unprimeable number, because it can be changed into a prime (51899027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3707069 + ... + 3707082.

It is an arithmetic number, because the mean of its divisors is an integer number (14828304).

Almost surely, 2^51899057 is an apocalyptic number.

It is an amenable number.

51899057 is a deficient number, since it is larger than the sum of its proper divisors (7414159).

51899057 is an equidigital number, since it uses as much as digits as its factorization.

51899057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414158.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 51899057 is about 7204.1000131869. The cubic root of 51899057 is about 373.0094394418.

The spelling of 51899057 in words is "fifty-one million, eight hundred ninety-nine thousand, fifty-seven".