51089040 has 60 divisors (see below), whose sum is σ = 171576444. Its totient is φ = 13623552.

The previous prime is 51089021. The next prime is 51089053. The reversal of 51089040 is 4098015.

It can be written as a sum of positive squares in 2 ways, for example, as 13927824 + 37161216 = 3732^2 + 6096^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×51089040² = 5220180016243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51088995 and 51089013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34759 + ... + 36198.

Almost surely, 2^51089040 is an apocalyptic number.

It is an amenable number.

51089040 is an abundant number, since it is smaller than the sum of its proper divisors (120487404).

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

51089040 is a wasteful number, since it uses less digits than its factorization.

51089040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70976 (or 70967 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51089040 is about 7147.6597568715. The cubic root of 51089040 is about 371.0586675215.

Subtracting from 51089040 its reverse (4098015), we obtain a square (46991025 = 6855²).

The spelling of 51089040 in words is "fifty-one million, eighty-nine thousand, forty".