22931481 has 4 divisors (see below), whose sum is σ = 30575312. Its totient is φ = 15287652.

The previous prime is 22931399. The next prime is 22931507. The reversal of 22931481 is 18413922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22931481 - 2¹³ = 22923289 is a prime.

It is a super-2 number, since 2×22931481² = 1051705641706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22931581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3821911 + ... + 3821916.

It is an arithmetic number, because the mean of its divisors is an integer number (7643828).

Almost surely, 2^22931481 is an apocalyptic number.

It is an amenable number.

22931481 is a deficient number, since it is larger than the sum of its proper divisors (7643831).

22931481 is an equidigital number, since it uses as much as digits as its factorization.

22931481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643830.

The product of its digits is 3456, while the sum is 30.

The square root of 22931481 is about 4788.6825954536. The cubic root of 22931481 is about 284.1040128503.

It can be divided in two parts, 2293 and 1481, that multiplied together give a palindrome (3395933).

The spelling of 22931481 in words is "twenty-two million, nine hundred thirty-one thousand, four hundred eighty-one".