51533388 has 48 divisors (see below), whose sum is σ = 134064000. Its totient is φ = 17118864.

The previous prime is 51533387. The next prime is 51533389. The reversal of 51533388 is 88333515.

It is an interprime number because it is at equal distance from previous prime (51533387) and next prime (51533389).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51533381) by changing a digit.

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, 40303 + ... + 41561.

It is an arithmetic number, because the mean of its divisors is an integer number (2793000).

Almost surely, 2^51533388 is an apocalyptic number.

It is an amenable number.

51533388 is an abundant number, since it is smaller than the sum of its proper divisors (82530612).

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

51533388 is a wasteful number, since it uses less digits than its factorization.

51533388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1643 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 51533388 is about 7178.6759224804. The cubic root of 51533388 is about 372.1313272013.

The spelling of 51533388 in words is "fifty-one million, five hundred thirty-three thousand, three hundred eighty-eight".