157887191 has 16 divisors (see below), whose sum is σ = 198885120. Its totient is φ = 121754880.

The previous prime is 157887137. The next prime is 157887217. The reversal of 157887191 is 191788751.

It is a cyclic number.

It is not a de Polignac number, because 157887191 - 2¹⁸ = 157625047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157887491) 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, 3101 + ... + 18038.

It is an arithmetic number, because the mean of its divisors is an integer number (12430320).

Almost surely, 2^157887191 is an apocalyptic number.

157887191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157887191 is a deficient number, since it is larger than the sum of its proper divisors (40997929).

157887191 is a wasteful number, since it uses less digits than its factorization.

157887191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21254.

The product of its digits is 141120, while the sum is 47.

The square root of 157887191 is about 12565.3169876450. The cubic root of 157887191 is about 540.4833247035.

The spelling of 157887191 in words is "one hundred fifty-seven million, eight hundred eighty-seven thousand, one hundred ninety-one".