220972137 has 24 divisors (see below), whose sum is σ = 316082016. Its totient is φ = 136840704.

The previous prime is 220972133. The next prime is 220972139. The reversal of 220972137 is 731279022.

220972137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220972137 - 2² = 220972133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220972098 and 220972107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220972133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 403698 + ... + 404244.

It is an arithmetic number, because the mean of its divisors is an integer number (13170084).

Almost surely, 2^220972137 is an apocalyptic number.

It is an amenable number.

220972137 is a deficient number, since it is larger than the sum of its proper divisors (95109879).

220972137 is an equidigital number, since it uses as much as digits as its factorization.

220972137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 220972137 is about 14865.1315836759. The cubic root of 220972137 is about 604.5689500678.

The spelling of 220972137 in words is "two hundred twenty million, nine hundred seventy-two thousand, one hundred thirty-seven".