51634540 has 24 divisors (see below), whose sum is σ = 113148000. Its totient is φ = 19755648.

The previous prime is 51634523. The next prime is 51634543. The reversal of 51634540 is 4543615.

51634540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51634540² = 5332251442023200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51634499 and 51634508.

It is not an unprimeable number, because it can be changed into a prime (51634543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55665 + ... + 56584.

It is an arithmetic number, because the mean of its divisors is an integer number (4714500).

Almost surely, 2^51634540 is an apocalyptic number.

It is an amenable number.

51634540 is an abundant number, since it is smaller than the sum of its proper divisors (61513460).

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

51634540 is a wasteful number, since it uses less digits than its factorization.

51634540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112281 (or 112279 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 51634540 is about 7185.7177790392. The cubic root of 51634540 is about 372.3746466488.

The spelling of 51634540 in words is "fifty-one million, six hundred thirty-four thousand, five hundred forty".