151615261 has 8 divisors (see below), whose sum is σ = 176811200. Its totient is φ = 129955644.

The previous prime is 151615237. The next prime is 151615283. The reversal of 151615261 is 162516151.

It is a happy number.

151615261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 151615261 - 2⁵ = 151615229 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 (151615361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220671 + ... + 221356.

It is an arithmetic number, because the mean of its divisors is an integer number (22101400).

Almost surely, 2^151615261 is an apocalyptic number.

It is an amenable number.

151615261 is a deficient number, since it is larger than the sum of its proper divisors (25195939).

151615261 is an frugal number, since it uses more digits than its factorization.

151615261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442048 (or 442034 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 151615261 is about 12313.2148929514. The cubic root of 151615261 is about 533.2296693921.

The spelling of 151615261 in words is "one hundred fifty-one million, six hundred fifteen thousand, two hundred sixty-one".