151165261 has 12 divisors (see below), whose sum is σ = 165943668. Its totient is φ = 137614464.

The previous prime is 151165249. The next prime is 151165277. The reversal of 151165261 is 162561151.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19053225 + 132112036 = 4365^2 + 11494^2 .

It is not a de Polignac number, because 151165261 - 2⁵ = 151165229 is a prime.

It is a super-2 number, since 2×151165261² = 45701872266396242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151165211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6211 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (13828639).

Almost surely, 2^151165261 is an apocalyptic number.

It is an amenable number.

151165261 is a deficient number, since it is larger than the sum of its proper divisors (14778407).

151165261 is a wasteful number, since it uses less digits than its factorization.

151165261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12352 (or 12339 counting only the distinct ones).

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

The square root of 151165261 is about 12294.9282633125. The cubic root of 151165261 is about 532.7015977920.

The spelling of 151165261 in words is "one hundred fifty-one million, one hundred sixty-five thousand, two hundred sixty-one".