51203900 has 36 divisors (see below), whose sum is σ = 121216200. Its totient is φ = 18619200.

The previous prime is 51203899. The next prime is 51203921. The reversal of 51203900 is 930215.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22175 + ... + 24374.

Almost surely, 2^51203900 is an apocalyptic number.

51203900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51203900 is an abundant number, since it is smaller than the sum of its proper divisors (70012300).

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

51203900 is a wasteful number, since it uses less digits than its factorization.

51203900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46574 (or 46567 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 51203900 is about 7155.6900435947. The cubic root of 51203900 is about 371.3365346770.

The spelling of 51203900 in words is "fifty-one million, two hundred three thousand, nine hundred".