22151131 has 4 divisors (see below), whose sum is σ = 23317000. Its totient is φ = 20985264.

The previous prime is 22151117. The next prime is 22151159. The reversal of 22151131 is 13115122.

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 22151131 - 2¹⁵ = 22118363 is a prime.

It is a super-2 number, since 2×22151131² = 981345209158322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22151161) 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, 582906 + ... + 582943.

It is an arithmetic number, because the mean of its divisors is an integer number (5829250).

Almost surely, 2^22151131 is an apocalyptic number.

22151131 is a deficient number, since it is larger than the sum of its proper divisors (1165869).

22151131 is a wasteful number, since it uses less digits than its factorization.

22151131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165868.

The product of its digits is 60, while the sum is 16.

The square root of 22151131 is about 4706.4988048442. The cubic root of 22151131 is about 280.8440982019.

Adding to 22151131 its reverse (13115122), we get a palindrome (35266253).

The spelling of 22151131 in words is "twenty-two million, one hundred fifty-one thousand, one hundred thirty-one".