51165501 has 16 divisors (see below), whose sum is σ = 71470464. Its totient is φ = 32497344.

The previous prime is 51165493. The next prime is 51165503. The reversal of 51165501 is 10556115.

It is not a de Polignac number, because 51165501 - 2³ = 51165493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51165503) 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, 17775 + ... + 20451.

It is an arithmetic number, because the mean of its divisors is an integer number (4466904).

Almost surely, 2^51165501 is an apocalyptic number.

It is an amenable number.

51165501 is a deficient number, since it is larger than the sum of its proper divisors (20304963).

51165501 is a wasteful number, since it uses less digits than its factorization.

51165501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 51165501 is about 7153.0064308653. The cubic root of 51165501 is about 371.2436868180.

The spelling of 51165501 in words is "fifty-one million, one hundred sixty-five thousand, five hundred one".