220490631 has 12 divisors (see below), whose sum is σ = 328760640. Its totient is φ = 142251840.

The previous prime is 220490623. The next prime is 220490639. The reversal of 220490631 is 136094022.

220490631 is a `hidden beast` number, since 2 + 20 + 4 + 9 + 0 + 631 = 666.

220490631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (220490623) and next prime (220490639).

It is not a de Polignac number, because 220490631 - 2³ = 220490623 is a prime.

It is a super-2 number, since 2×220490631² = 97232236717556322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220490595 and 220490604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220490639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394866 + ... + 395423.

It is an arithmetic number, because the mean of its divisors is an integer number (27396720).

Almost surely, 2^220490631 is an apocalyptic number.

220490631 is a deficient number, since it is larger than the sum of its proper divisors (108270009).

220490631 is a wasteful number, since it uses less digits than its factorization.

220490631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790326 (or 790323 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 220490631 is about 14848.9269309267. The cubic root of 220490631 is about 604.1295051092.

The spelling of 220490631 in words is "two hundred twenty million, four hundred ninety thousand, six hundred thirty-one".