2221369731 has 16 divisors (see below), whose sum is σ = 3761049600. Its totient is φ = 1269354024.

The previous prime is 2221369727. The next prime is 2221369747. The reversal of 2221369731 is 1379631222.

2221369731 is a `hidden beast` number, since 2 + 221 + 369 + 73 + 1 = 666.

It is not a de Polignac number, because 2221369731 - 2² = 2221369727 is a prime.

It is a super-2 number, since 2×2221369731² = 9868966963606024722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2221369531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5876451 + ... + 5876828.

It is an arithmetic number, because the mean of its divisors is an integer number (235065600).

Almost surely, 2^2221369731 is an apocalyptic number.

2221369731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221369731 is a deficient number, since it is larger than the sum of its proper divisors (1539679869).

2221369731 is a wasteful number, since it uses less digits than its factorization.

2221369731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11753295 (or 11753289 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 2221369731 is about 47131.4091768960. The cubic root of 2221369731 is about 1304.7889895318.

The spelling of 2221369731 in words is "two billion, two hundred twenty-one million, three hundred sixty-nine thousand, seven hundred thirty-one".