51433992 has 24 divisors (see below), whose sum is σ = 139300590. Its totient is φ = 17144640.

The previous prime is 51433981. The next prime is 51433999. The reversal of 51433992 is 29933415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 22982436 = 5334^2 + 4794^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 (51433999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357109 + ... + 357252.

Almost surely, 2^51433992 is an apocalyptic number.

It is an amenable number.

51433992 is an abundant number, since it is smaller than the sum of its proper divisors (87866598).

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

51433992 is a wasteful number, since it uses less digits than its factorization.

51433992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714373 (or 714366 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 51433992 is about 7171.7495773347. The cubic root of 51433992 is about 371.8919214295.

It can be divided in two parts, 51433 and 992, that added together give a palindrome (52425).

The spelling of 51433992 in words is "fifty-one million, four hundred thirty-three thousand, nine hundred ninety-two".