30187157 has 32 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 21265920.

The previous prime is 30187151. The next prime is 30187177. The reversal of 30187157 is 75178103.

It is not a de Polignac number, because 30187157 - 2¹⁶ = 30121621 is a prime.

It is a super-2 number, since 2×30187157² = 1822528895485298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30187151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52769 + ... + 53337.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^30187157 is an apocalyptic number.

It is an amenable number.

30187157 is a deficient number, since it is larger than the sum of its proper divisors (11181163).

30187157 is a wasteful number, since it uses less digits than its factorization.

30187157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 30187157 is about 5494.2840297895. The cubic root of 30187157 is about 311.3680674422.

The spelling of 30187157 in words is "thirty million, one hundred eighty-seven thousand, one hundred fifty-seven".