51933540 has 48 divisors (see below), whose sum is σ = 151740288. Its totient is φ = 13246464.

The previous prime is 51933529. The next prime is 51933571. The reversal of 51933540 is 4533915.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51933498 and 51933507.

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 15 ways as a sum of consecutive naturals, for example, 17437 + ... + 20196.

It is an arithmetic number, because the mean of its divisors is an integer number (3161256).

Almost surely, 2^51933540 is an apocalyptic number.

It is an amenable number.

51933540 is an abundant number, since it is smaller than the sum of its proper divisors (99806748).

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

51933540 is a wasteful number, since it uses less digits than its factorization.

51933540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37668 (or 37666 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 51933540 is about 7206.4929057066. The cubic root of 51933540 is about 373.0920333435.

The spelling of 51933540 in words is "fifty-one million, nine hundred thirty-three thousand, five hundred forty".