51072190 has 128 divisors (see below), whose sum is σ = 116121600. Its totient is φ = 15966720.

The previous prime is 51072181. The next prime is 51072193. The reversal of 51072190 is 9127015.

It is a super-2 number, since 2×51072190² = 5216737182792200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072193) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1647475 + ... + 1647505.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^51072190 is an apocalyptic number.

51072190 is an abundant number, since it is smaller than the sum of its proper divisors (65049410).

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

51072190 is a wasteful number, since it uses less digits than its factorization.

51072190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 51072190 is about 7146.4809521890. The cubic root of 51072190 is about 371.0178692991.

The spelling of 51072190 in words is "fifty-one million, seventy-two thousand, one hundred ninety".