222506631 has 12 divisors (see below), whose sum is σ = 329238000. Its totient is φ = 144719520.

The previous prime is 222506629. The next prime is 222506671. The reversal of 222506631 is 136605222.

222506631 is a `hidden beast` number, since 2 + 2 + 25 + 0 + 6 + 631 = 666.

222506631 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 222506631 - 2¹ = 222506629 is a prime.

It is a super-2 number, since 2×222506631² = 99018401677940322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222506595 and 222506604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222506671) 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, 301131 + ... + 301868.

It is an arithmetic number, because the mean of its divisors is an integer number (27436500).

Almost surely, 2^222506631 is an apocalyptic number.

222506631 is a deficient number, since it is larger than the sum of its proper divisors (106731369).

222506631 is a wasteful number, since it uses less digits than its factorization.

222506631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603046 (or 603043 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 222506631 is about 14916.6561601453. The cubic root of 222506631 is about 605.9651566412.

The spelling of 222506631 in words is "two hundred twenty-two million, five hundred six thousand, six hundred thirty-one".