155475961 has 9 divisors (see below), whose sum is σ = 160267149. Its totient is φ = 150825024.

The previous prime is 155475959. The next prime is 155476037. The reversal of 155475961 is 169574551.

The square root of 155475961 is 12469.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7123561 + 148352400 = 2669^2 + 12180^2 .

It is not a de Polignac number, because 155475961 - 2¹ = 155475959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155475941) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 461185 + ... + 461521.

It is an arithmetic number, because the mean of its divisors is an integer number (17807461).

Almost surely, 2^155475961 is an apocalyptic number.

155475961 is the 12469-th square number.

155475961 is the 6235-th centered octagonal number.

It is an amenable number.

155475961 is a deficient number, since it is larger than the sum of its proper divisors (4791188).

155475961 is an frugal number, since it uses more digits than its factorization.

155475961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 374 counting only the distinct ones).

The product of its digits is 189000, while the sum is 43.

The cubic root of 155475961 is about 537.7178043566.

The spelling of 155475961 in words is "one hundred fifty-five million, four hundred seventy-five thousand, nine hundred sixty-one".