51000432 has 40 divisors (see below), whose sum is σ = 150573696. Its totient is φ = 14571456.

The previous prime is 51000431. The next prime is 51000437. The reversal of 51000432 is 23400015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75558 + ... + 76229.

Almost surely, 2^51000432 is an apocalyptic number.

It is an amenable number.

51000432 is an abundant number, since it is smaller than the sum of its proper divisors (99573264).

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

51000432 is a wasteful number, since it uses less digits than its factorization.

51000432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151805 (or 151799 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51000432 is about 7141.4586745286. The cubic root of 51000432 is about 370.8440240097.

Adding to 51000432 its reverse (23400015), we get a palindrome (74400447).

The spelling of 51000432 in words is "fifty-one million, four hundred thirty-two", and thus it is an aban number.