51916040 has 32 divisors (see below), whose sum is σ = 127431360. Its totient is φ = 18878400.

The previous prime is 51916031. The next prime is 51916043. The reversal of 51916040 is 4061915.

It is not an unprimeable number, because it can be changed into a prime (51916043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58556 + ... + 59435.

It is an arithmetic number, because the mean of its divisors is an integer number (3982230).

Almost surely, 2^51916040 is an apocalyptic number.

It is an amenable number.

51916040 is an abundant number, since it is smaller than the sum of its proper divisors (75515320).

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

51916040 is a wasteful number, since it uses less digits than its factorization.

51916040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118013 (or 118009 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 51916040 is about 7205.2786205670. The cubic root of 51916040 is about 373.0501218024.

Adding to 51916040 its reverse (4061915), we get a palindrome (55977955).

The spelling of 51916040 in words is "fifty-one million, nine hundred sixteen thousand, forty".