20231552 has 32 divisors (see below), whose sum is σ = 43972200. Its totient is φ = 9195520.

The previous prime is 20231551. The next prime is 20231557. The reversal of 20231552 is 25513202.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231551) 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, 5777 + ... + 8592.

Almost surely, 2^20231552 is an apocalyptic number.

20231552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20231552 is an abundant number, since it is smaller than the sum of its proper divisors (23740648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20231552 is a wasteful number, since it uses less digits than its factorization.

20231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14394 (or 14382 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20231552 is about 4497.9497551662. The cubic root of 20231552 is about 272.4852928123.

Adding to 20231552 its reverse (25513202), we get a palindrome (45744754).

The spelling of 20231552 in words is "twenty million, two hundred thirty-one thousand, five hundred fifty-two".