22154513 has 4 divisors (see below), whose sum is σ = 23320560. Its totient is φ = 20988468.

The previous prime is 22154501. The next prime is 22154533. The reversal of 22154513 is 31545122.

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 a cyclic number.

It is not a de Polignac number, because 22154513 - 2⁶ = 22154449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22154533) 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, 582995 + ... + 583032.

It is an arithmetic number, because the mean of its divisors is an integer number (5830140).

Almost surely, 2^22154513 is an apocalyptic number.

It is an amenable number.

22154513 is a deficient number, since it is larger than the sum of its proper divisors (1166047).

22154513 is a wasteful number, since it uses less digits than its factorization.

22154513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166046.

The product of its digits is 1200, while the sum is 23.

The square root of 22154513 is about 4706.8580815657. The cubic root of 22154513 is about 280.8583904203.

Adding to 22154513 its reverse (31545122), we get a palindrome (53699635).

The spelling of 22154513 in words is "twenty-two million, one hundred fifty-four thousand, five hundred thirteen".