51061136 has 30 divisors (see below), whose sum is σ = 115084710. Its totient is φ = 21883008.

The previous prime is 51061111. The next prime is 51061139. The reversal of 51061136 is 63116015.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32947600 + 18113536 = 5740^2 + 4256^2 .

It is a super-2 number, since 2×51061136² = 5214479219220992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51061139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31781 + ... + 33348.

It is an arithmetic number, because the mean of its divisors is an integer number (3836157).

Almost surely, 2^51061136 is an apocalyptic number.

51061136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51061136 is an abundant number, since it is smaller than the sum of its proper divisors (64023574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51061136 is a wasteful number, since it uses less digits than its factorization.

51061136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65151 (or 65138 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51061136 is about 7145.7075227020. The cubic root of 51061136 is about 370.9910998221.

The spelling of 51061136 in words is "fifty-one million, sixty-one thousand, one hundred thirty-six".