51335891 has 8 divisors (see below), whose sum is σ = 55188480. Its totient is φ = 47598408.

The previous prime is 51335873. The next prime is 51335899. The reversal of 51335891 is 19853315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51335891 - 2⁶ = 51335827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51335899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27851 + ... + 29636.

It is an arithmetic number, because the mean of its divisors is an integer number (6898560).

Almost surely, 2^51335891 is an apocalyptic number.

51335891 is a deficient number, since it is larger than the sum of its proper divisors (3852589).

51335891 is a wasteful number, since it uses less digits than its factorization.

51335891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57553.

The product of its digits is 16200, while the sum is 35.

The square root of 51335891 is about 7164.9069079786. The cubic root of 51335891 is about 371.6553321788.

The spelling of 51335891 in words is "fifty-one million, three hundred thirty-five thousand, eight hundred ninety-one".