22554531 has 16 divisors (see below), whose sum is σ = 33829920. Its totient is φ = 15034896.

The previous prime is 22554523. The next prime is 22554541. The reversal of 22554531 is 13545522.

It is a happy number.

It is not a de Polignac number, because 22554531 - 2³ = 22554523 is a prime.

It is a super-2 number, since 2×22554531² = 1017413737259922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 22554495 and 22554504.

It is not an unprimeable number, because it can be changed into a prime (22554541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2970 + ... + 7343.

It is an arithmetic number, because the mean of its divisors is an integer number (2114370).

Almost surely, 2^22554531 is an apocalyptic number.

22554531 is a deficient number, since it is larger than the sum of its proper divisors (11275389).

22554531 is an frugal number, since it uses more digits than its factorization.

22554531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10334 (or 10316 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 22554531 is about 4749.1610838126. The cubic root of 22554531 is about 282.5386941542.

Subtracting from 22554531 its reverse (13545522), we obtain a palindrome (9009009).

It can be divided in two parts, 2255 and 4531, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 22554531 in words is "twenty-two million, five hundred fifty-four thousand, five hundred thirty-one".