151187531 has 8 divisors (see below), whose sum is σ = 166232064. Its totient is φ = 136359720.

The previous prime is 151187521. The next prime is 151187537. The reversal of 151187531 is 135781151.

It is a happy number.

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 151187531 - 2⁶ = 151187467 is a prime.

It is a super-2 number, since 2×151187531² = 45715339059751922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151187537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52715 + ... + 55508.

It is an arithmetic number, because the mean of its divisors is an integer number (20779008).

Almost surely, 2^151187531 is an apocalyptic number.

151187531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

151187531 is a deficient number, since it is larger than the sum of its proper divisors (15044533).

151187531 is a wasteful number, since it uses less digits than its factorization.

151187531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108361.

The product of its digits is 4200, while the sum is 32.

The square root of 151187531 is about 12295.8338879476. The cubic root of 151187531 is about 532.7277560993.

The spelling of 151187531 in words is "one hundred fifty-one million, one hundred eighty-seven thousand, five hundred thirty-one".