51268540 has 24 divisors (see below), whose sum is σ = 109956672. Its totient is φ = 20070720.

The previous prime is 51268531. The next prime is 51268561. The reversal of 51268540 is 4586215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26331 + ... + 28210.

It is an arithmetic number, because the mean of its divisors is an integer number (4581528).

Almost surely, 2^51268540 is an apocalyptic number.

It is an amenable number.

51268540 is an abundant number, since it is smaller than the sum of its proper divisors (58688132).

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

51268540 is a wasteful number, since it uses less digits than its factorization.

51268540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54597 (or 54595 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 51268540 is about 7160.2053043191. The cubic root of 51268540 is about 371.4927278582.

The spelling of 51268540 in words is "fifty-one million, two hundred sixty-eight thousand, five hundred forty".