51101565 has 16 divisors (see below), whose sum is σ = 82134528. Its totient is φ = 27130176.

The previous prime is 51101527. The next prime is 51101569. The reversal of 51101565 is 56510115.

It is not a de Polignac number, because 51101565 - 2²² = 46907261 is a prime.

It is a super-2 number, since 2×51101565² = 5222739890898450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101569) 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, 4294 + ... + 10983.

It is an arithmetic number, because the mean of its divisors is an integer number (5133408).

Almost surely, 2^51101565 is an apocalyptic number.

It is an amenable number.

51101565 is a deficient number, since it is larger than the sum of its proper divisors (31032963).

51101565 is a wasteful number, since it uses less digits than its factorization.

51101565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15508.

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

The square root of 51101565 is about 7148.5358640773. The cubic root of 51101565 is about 371.0889879847.

The spelling of 51101565 in words is "fifty-one million, one hundred one thousand, five hundred sixty-five".