22540432015 has 4 divisors (see below), whose sum is σ = 27048518424. Its totient is φ = 18032345608.

The previous prime is 22540431997. The next prime is 22540432043. The reversal of 22540432015 is 51023404522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51023404522 = 2 ⋅25511702261.

It is a cyclic number.

It is not a de Polignac number, because 22540432015 - 2⁷ = 22540431887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254043197 + ... + 2254043206.

It is an arithmetic number, because the mean of its divisors is an integer number (6762129606).

Almost surely, 2^22540432015 is an apocalyptic number.

22540432015 is a deficient number, since it is larger than the sum of its proper divisors (4508086409).

22540432015 is an equidigital number, since it uses as much as digits as its factorization.

22540432015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508086408.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 22540432015 its reverse (51023404522), we get a palindrome (73563836537).

The spelling of 22540432015 in words is "twenty-two billion, five hundred forty million, four hundred thirty-two thousand, fifteen".