22720319131 has 4 divisors (see below), whose sum is σ = 22777549552. Its totient is φ = 22663088712.

The previous prime is 22720319129. The next prime is 22720319159. The reversal of 22720319131 is 13191302722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22720319131 - 2¹ = 22720319129 is a prime.

It is a super-2 number, since 2×22720319131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22720319093 and 22720319102.

It is not an unprimeable number, because it can be changed into a prime (22720319161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28614615 + ... + 28615408.

It is an arithmetic number, because the mean of its divisors is an integer number (5694387388).

Almost surely, 2^22720319131 is an apocalyptic number.

22720319131 is a deficient number, since it is larger than the sum of its proper divisors (57230421).

22720319131 is an equidigital number, since it uses as much as digits as its factorization.

22720319131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57230420.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 22720319131 in words is "twenty-two billion, seven hundred twenty million, three hundred nineteen thousand, one hundred thirty-one".