51099655 has 8 divisors (see below), whose sum is σ = 61401312. Its totient is φ = 40825248.

The previous prime is 51099641. The next prime is 51099661. The reversal of 51099655 is 55699015.

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 51099655 - 2⁹ = 51099143 is a prime.

It is a super-2 number, since 2×51099655² = 5222349482238050, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 2427 + ... + 10396.

It is an arithmetic number, because the mean of its divisors is an integer number (7675164).

Almost surely, 2^51099655 is an apocalyptic number.

51099655 is a deficient number, since it is larger than the sum of its proper divisors (10301657).

51099655 is a wasteful number, since it uses less digits than its factorization.

51099655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13625.

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 51099655 is about 7148.4022690389. The cubic root of 51099655 is about 371.0843645855.

The spelling of 51099655 in words is "fifty-one million, ninety-nine thousand, six hundred fifty-five".