220868137 has 12 divisors (see below), whose sum is σ = 257766996. Its totient is φ = 188697600.

The previous prime is 220868111. The next prime is 220868159. The reversal of 220868137 is 731868022.

It can be written as a sum of positive squares in 2 ways, for example, as 117418896 + 103449241 = 10836^2 + 10171^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220868137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220868096 and 220868105.

It is not an unprimeable number, because it can be changed into a prime (220868177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8137 + ... + 22537.

It is an arithmetic number, because the mean of its divisors is an integer number (21480583).

Almost surely, 2^220868137 is an apocalyptic number.

It is an amenable number.

220868137 is a deficient number, since it is larger than the sum of its proper divisors (36898859).

220868137 is a wasteful number, since it uses less digits than its factorization.

220868137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14728 (or 14721 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 220868137 is about 14861.6330529320. The cubic root of 220868137 is about 604.4740888812.

The spelling of 220868137 in words is "two hundred twenty million, eight hundred sixty-eight thousand, one hundred thirty-seven".