51136955 has 4 divisors (see below), whose sum is σ = 61364352. Its totient is φ = 40909560.

The previous prime is 51136951. The next prime is 51136991. The reversal of 51136955 is 55963115.

It is a happy number.

51136955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51136955 - 2² = 51136951 is a prime.

It is a super-2 number, since 2×51136955² = 5229976333344050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51136951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113691 + ... + 5113700.

It is an arithmetic number, because the mean of its divisors is an integer number (15341088).

Almost surely, 2^51136955 is an apocalyptic number.

51136955 is a deficient number, since it is larger than the sum of its proper divisors (10227397).

51136955 is a wasteful number, since it uses less digits than its factorization.

51136955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10227396.

The product of its digits is 20250, while the sum is 35.

The square root of 51136955 is about 7151.0107677167. The cubic root of 51136955 is about 371.1746331684.

The spelling of 51136955 in words is "fifty-one million, one hundred thirty-six thousand, nine hundred fifty-five".