22287161421 has 160 divisors (see below), whose sum is σ = 40609536000. Its totient is φ = 12162286080.

The previous prime is 22287161417. The next prime is 22287161431. The reversal of 22287161421 is 12416178222.

22287161421 is a `hidden beast` number, since 2 + 228 + 7 + 1 + 6 + 1 + 421 = 666.

It is not a de Polignac number, because 22287161421 - 2² = 22287161417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287161431) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 97323735 + ... + 97323963.

It is an arithmetic number, because the mean of its divisors is an integer number (253809600).

Almost surely, 2^22287161421 is an apocalyptic number.

22287161421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22287161421 is a deficient number, since it is larger than the sum of its proper divisors (18322374579).

22287161421 is a wasteful number, since it uses less digits than its factorization.

22287161421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 383 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The spelling of 22287161421 in words is "twenty-two billion, two hundred eighty-seven million, one hundred sixty-one thousand, four hundred twenty-one".