51111255 has 16 divisors (see below), whose sum is σ = 88068960. Its totient is φ = 25162368.

The previous prime is 51111251. The next prime is 51111257. The reversal of 51111255 is 55211115.

It is not a de Polignac number, because 51111255 - 2² = 51111251 is a prime.

It is a super-2 number, since 2×51111255² = 5224720775350050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111251) 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, 130860 + ... + 131249.

It is an arithmetic number, because the mean of its divisors is an integer number (5504310).

Almost surely, 2^51111255 is an apocalyptic number.

51111255 is a deficient number, since it is larger than the sum of its proper divisors (36957705).

51111255 is a wasteful number, since it uses less digits than its factorization.

51111255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262130.

The product of its digits is 250, while the sum is 21.

The square root of 51111255 is about 7149.2135931164. The cubic root of 51111255 is about 371.1124420937.

The spelling of 51111255 in words is "fifty-one million, one hundred eleven thousand, two hundred fifty-five".