22220591031 has 8 divisors (see below), whose sum is σ = 32919394160. Its totient is φ = 14813727336.

The previous prime is 22220591023. The next prime is 22220591077. The reversal of 22220591031 is 13019502222.

It is a happy number.

22220591031 is a `hidden beast` number, since 2 + 22 + 20 + 591 + 0 + 31 = 666.

It is not a de Polignac number, because 22220591031 - 2³ = 22220591023 is a prime.

It is a super-2 number, since 2×22220591031² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 822984853 = 22220591031 / (2 + 2 + 2 + 2 + 0 + 5 + 9 + 1 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220590986 and 22220591004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220591011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411492400 + ... + 411492453.

It is an arithmetic number, because the mean of its divisors is an integer number (4114924270).

Almost surely, 2^22220591031 is an apocalyptic number.

22220591031 is a deficient number, since it is larger than the sum of its proper divisors (10698803129).

22220591031 is an equidigital number, since it uses as much as digits as its factorization.

22220591031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822984862 (or 822984856 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

It can be divided in two parts, 222205 and 91031, that added together give a triangular number (313236 = T₇₉₁).

The spelling of 22220591031 in words is "twenty-two billion, two hundred twenty million, five hundred ninety-one thousand, thirty-one".