189542251 has 8 divisors (see below), whose sum is σ = 192199680. Its totient is φ = 186891432.

The previous prime is 189542219. The next prime is 189542273. The reversal of 189542251 is 152245981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189542251 - 2⁵ = 189542219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189542251.

It is not an unprimeable number, because it can be changed into a prime (189542281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90846 + ... + 92908.

It is an arithmetic number, because the mean of its divisors is an integer number (24024960).

Almost surely, 2^189542251 is an apocalyptic number.

189542251 is a deficient number, since it is larger than the sum of its proper divisors (2657429).

189542251 is a wasteful number, since it uses less digits than its factorization.

189542251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305.

The product of its digits is 28800, while the sum is 37.

The square root of 189542251 is about 13767.4344378319. The cubic root of 189542251 is about 574.4276608702.

The spelling of 189542251 in words is "one hundred eighty-nine million, five hundred forty-two thousand, two hundred fifty-one".