151581215 has 16 divisors (see below), whose sum is σ = 184963296. Its totient is φ = 119232000.

The previous prime is 151581191. The next prime is 151581217. The reversal of 151581215 is 512185151.

It is a de Polignac number, because none of the positive numbers 2^k-151581215 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 (151581217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219020 + ... + 219710.

It is an arithmetic number, because the mean of its divisors is an integer number (11560206).

Almost surely, 2^151581215 is an apocalyptic number.

151581215 is a deficient number, since it is larger than the sum of its proper divisors (33382081).

151581215 is an equidigital number, since it uses as much as digits as its factorization.

151581215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its digits is 2000, while the sum is 29.

The square root of 151581215 is about 12311.8323169218. The cubic root of 151581215 is about 533.1897532336.

The spelling of 151581215 in words is "one hundred fifty-one million, five hundred eighty-one thousand, two hundred fifteen".