51198965 has 16 divisors (see below), whose sum is σ = 62814528. Its totient is φ = 40052736.

The previous prime is 51198913. The next prime is 51198991. The reversal of 51198965 is 56989115.

It is a cyclic number.

It is not a de Polignac number, because 51198965 - 2¹⁶ = 51133429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43829 + ... + 44981.

It is an arithmetic number, because the mean of its divisors is an integer number (3925908).

Almost surely, 2^51198965 is an apocalyptic number.

It is an amenable number.

51198965 is a deficient number, since it is larger than the sum of its proper divisors (11615563).

51198965 is a wasteful number, since it uses less digits than its factorization.

51198965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its digits is 97200, while the sum is 44.

The square root of 51198965 is about 7155.3452048102. The cubic root of 51198965 is about 371.3246045657.

The spelling of 51198965 in words is "fifty-one million, one hundred ninety-eight thousand, nine hundred sixty-five".