151535591 has 4 divisors (see below), whose sum is σ = 151560552. Its totient is φ = 151510632.

The previous prime is 151535551. The next prime is 151535611. The reversal of 151535591 is 195535151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151535591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151535521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3161 + ... + 17693.

It is an arithmetic number, because the mean of its divisors is an integer number (37890138).

Almost surely, 2^151535591 is an apocalyptic number.

151535591 is a deficient number, since it is larger than the sum of its proper divisors (24961).

151535591 is a wasteful number, since it uses less digits than its factorization.

151535591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24960.

The product of its digits is 16875, while the sum is 35.

The square root of 151535591 is about 12309.9793257341. The cubic root of 151535591 is about 533.1362534417.

The spelling of 151535591 in words is "one hundred fifty-one million, five hundred thirty-five thousand, five hundred ninety-one".