51401630 has 32 divisors (see below), whose sum is σ = 109391040. Its totient is φ = 17015040.

The previous prime is 51401629. The next prime is 51401633. The reversal of 51401630 is 3610415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51401633) 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, 10631 + ... + 14690.

It is an arithmetic number, because the mean of its divisors is an integer number (3418470).

Almost surely, 2^51401630 is an apocalyptic number.

51401630 is an abundant number, since it is smaller than the sum of its proper divisors (57989410).

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

51401630 is a wasteful number, since it uses less digits than its factorization.

51401630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25364.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51401630 is about 7169.4930085746. The cubic root of 51401630 is about 371.8139075783.

The spelling of 51401630 in words is "fifty-one million, four hundred one thousand, six hundred thirty".