51722190 has 48 divisors (see below), whose sum is σ = 144825408. Its totient is φ = 12731328.

The previous prime is 51722159. The next prime is 51722213. The reversal of 51722190 is 9122715.

It is a super-2 number, since 2×51722190² = 5350369876792200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20934 + ... + 23273.

It is an arithmetic number, because the mean of its divisors is an integer number (3017196).

Almost surely, 2^51722190 is an apocalyptic number.

51722190 is an abundant number, since it is smaller than the sum of its proper divisors (93103218).

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

51722190 is a wasteful number, since it uses less digits than its factorization.

51722190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44233 (or 44230 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51722190 is about 7191.8140965962. The cubic root of 51722190 is about 372.5852304109.

The spelling of 51722190 in words is "fifty-one million, seven hundred twenty-two thousand, one hundred ninety".