151616261 has 4 divisors (see below), whose sum is σ = 152100972. Its totient is φ = 151131552.

The previous prime is 151616239. The next prime is 151616273. The reversal of 151616261 is 162616151.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27984100 + 123632161 = 5290^2 + 11119^2 .

It is a cyclic number.

It is not a de Polignac number, because 151616261 - 2⁶ = 151616197 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 (151616221) 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, 241886 + ... + 242511.

It is an arithmetic number, because the mean of its divisors is an integer number (38025243).

Almost surely, 2^151616261 is an apocalyptic number.

It is an amenable number.

151616261 is a deficient number, since it is larger than the sum of its proper divisors (484711).

151616261 is an equidigital number, since it uses as much as digits as its factorization.

151616261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484710.

The product of its digits is 2160, while the sum is 29.

The square root of 151616261 is about 12313.2554996638. The cubic root of 151616261 is about 533.2308417202.

The spelling of 151616261 in words is "one hundred fifty-one million, six hundred sixteen thousand, two hundred sixty-one".