151591 has 4 divisors (see below), whose sum is σ = 165384. Its totient is φ = 137800.

The previous prime is 151579. The next prime is 151597. The reversal of 151591 is 195151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 151591 - 2¹¹ = 149543 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6880 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (41346).

2¹⁵¹⁵⁹¹ is an apocalyptic number.

151591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

151591 is a deficient number, since it is larger than the sum of its proper divisors (13793).

151591 is a wasteful number, since it uses less digits than its factorization.

151591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792.

The product of its digits is 225, while the sum is 22.

The square root of 151591 is about 389.3468890334. The cubic root of 151591 is about 53.3201225960.

The spelling of 151591 in words is "one hundred fifty-one thousand, five hundred ninety-one".