51772620 has 48 divisors (see below), whose sum is σ = 148887648. Its totient is φ = 13432320.

The previous prime is 51772603. The next prime is 51772631. The reversal of 51772620 is 2627715.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9441 + ... + 13880.

It is an arithmetic number, because the mean of its divisors is an integer number (3101826).

Almost surely, 2^51772620 is an apocalyptic number.

It is an amenable number.

51772620 is an abundant number, since it is smaller than the sum of its proper divisors (97115028).

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

51772620 is a wasteful number, since it uses less digits than its factorization.

51772620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23370 (or 23368 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 51772620 is about 7195.3193118860. The cubic root of 51772620 is about 372.7062833529.

It can be divided in two parts, 517 and 72620, that added together give a palindrome (73137).

The spelling of 51772620 in words is "fifty-one million, seven hundred seventy-two thousand, six hundred twenty".