22915901 has 4 divisors (see below), whose sum is σ = 22925532. Its totient is φ = 22906272.

The previous prime is 22915897. The next prime is 22915903. The reversal of 22915901 is 10951922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10951922 = 2 ⋅5475961.

It can be written as a sum of positive squares in 2 ways, for example, as 19404025 + 3511876 = 4405^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 22915901 - 2² = 22915897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22915903) 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, 1631 + ... + 6963.

It is an arithmetic number, because the mean of its divisors is an integer number (5731383).

Almost surely, 2^22915901 is an apocalyptic number.

It is an amenable number.

22915901 is a deficient number, since it is larger than the sum of its proper divisors (9631).

22915901 is an equidigital number, since it uses as much as digits as its factorization.

22915901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 22915901 is about 4787.0555668386. The cubic root of 22915901 is about 284.0396567316.

It can be divided in two parts, 2291 and 5901, that added together give a 13-th power (8192 = 2¹³).

The spelling of 22915901 in words is "twenty-two million, nine hundred fifteen thousand, nine hundred one".