151265561 has 6 divisors (see below), whose sum is σ = 152147562. Its totient is φ = 150388640.

The previous prime is 151265533. The next prime is 151265567. The reversal of 151265561 is 165562151.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 20025625 = 11456^2 + 4475^2 .

It is not a de Polignac number, because 151265561 - 2⁶ = 151265497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151265567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29681 + ... + 34401.

It is an arithmetic number, because the mean of its divisors is an integer number (25357927).

Almost surely, 2^151265561 is an apocalyptic number.

It is an amenable number.

151265561 is a deficient number, since it is larger than the sum of its proper divisors (882001).

151265561 is an frugal number, since it uses more digits than its factorization.

151265561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079 (or 4900 counting only the distinct ones).

The product of its digits is 9000, while the sum is 32.

The square root of 151265561 is about 12299.0065045921. The cubic root of 151265561 is about 532.8193897528.

The spelling of 151265561 in words is "one hundred fifty-one million, two hundred sixty-five thousand, five hundred sixty-one".