51030906 has 32 divisors (see below), whose sum is σ = 108371520. Its totient is φ = 15964416.

The previous prime is 51030901. The next prime is 51030949. The reversal of 51030906 is 60903015.

It is not an unprimeable number, because it can be changed into a prime (51030901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68685 + ... + 69423.

It is an arithmetic number, because the mean of its divisors is an integer number (3386610).

Almost surely, 2^51030906 is an apocalyptic number.

51030906 is an abundant number, since it is smaller than the sum of its proper divisors (57340614).

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

51030906 is a wasteful number, since it uses less digits than its factorization.

51030906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 51030906 is about 7143.5919536323. The cubic root of 51030906 is about 370.9178720812.

The spelling of 51030906 in words is "fifty-one million, thirty thousand, nine hundred six".