51095140 has 12 divisors (see below), whose sum is σ = 107299836. Its totient is φ = 20438048.

The previous prime is 51095131. The next prime is 51095141. The reversal of 51095140 is 4159015.

It can be written as a sum of positive squares in 2 ways, for example, as 27436644 + 23658496 = 5238^2 + 4864^2 .

It is a super-2 number, since 2×51095140² = 5221426663239200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51095141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277359 + ... + 1277398.

It is an arithmetic number, because the mean of its divisors is an integer number (8941653).

Almost surely, 2^51095140 is an apocalyptic number.

It is an amenable number.

51095140 is an abundant number, since it is smaller than the sum of its proper divisors (56204696).

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

51095140 is a wasteful number, since it uses less digits than its factorization.

51095140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554766 (or 2554764 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51095140 is about 7148.0864572276. The cubic root of 51095140 is about 371.0734349928.

The spelling of 51095140 in words is "fifty-one million, ninety-five thousand, one hundred forty".