22151552 has 16 divisors (see below), whose sum is σ = 44130300. Its totient is φ = 11075712.

The previous prime is 22151551. The next prime is 22151573. The reversal of 22151552 is 25515122.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86402 + ... + 86657.

Almost surely, 2^22151552 is an apocalyptic number.

It is an amenable number.

22151552 is a deficient number, since it is larger than the sum of its proper divisors (21978748).

22151552 is an equidigital number, since it uses as much as digits as its factorization.

22151552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173073 (or 173061 counting only the distinct ones).

The product of its digits is 1000, while the sum is 23.

The square root of 22151552 is about 4706.5435300229. The cubic root of 22151552 is about 280.8458774130.

Adding to 22151552 its reverse (25515122), we get a palindrome (47666674).

The spelling of 22151552 in words is "twenty-two million, one hundred fifty-one thousand, five hundred fifty-two".