187172552 has 36 divisors (see below), whose sum is σ = 408837915. Its totient is φ = 80100720.

The previous prime is 187172549. The next prime is 187172599. The reversal of 187172552 is 255271781.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 93586276 + 93586276 = 9674^2 + 9674^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9674.

It is a Duffinian number.

Its product of digits (39200) is a multiple of the sum of its prime divisors (700).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 270527 + ... + 271217.

Almost surely, 2^187172552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187172552

187172552 is an abundant number, since it is smaller than the sum of its proper divisors (221665363).

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

187172552 is an frugal number, since it uses more digits than its factorization.

187172552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 700 counting only the distinct ones).

The product of its digits is 39200, while the sum is 38.

The square root of 187172552 is about 13681.1020023973. The cubic root of 187172552 is about 572.0237410069.

Multiplying 187172552 by its product of digits (39200), we get a square (7337164038400 = 2708720²).

The spelling of 187172552 in words is "one hundred eighty-seven million, one hundred seventy-two thousand, five hundred fifty-two".