155050961 has 4 divisors (see below), whose sum is σ = 166977972. Its totient is φ = 143123952.

The previous prime is 155050949. The next prime is 155050993. The reversal of 155050961 is 169050551.

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 90345025 + 64705936 = 9505^2 + 8044^2 .

It is a cyclic number.

It is not a de Polignac number, because 155050961 - 2²⁶ = 87942097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155050921) 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, 5963486 + ... + 5963511.

It is an arithmetic number, because the mean of its divisors is an integer number (41744493).

Almost surely, 2^155050961 is an apocalyptic number.

It is an amenable number.

155050961 is a deficient number, since it is larger than the sum of its proper divisors (11927011).

155050961 is a wasteful number, since it uses less digits than its factorization.

155050961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11927010.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 155050961 is about 12451.9460728032. The cubic root of 155050961 is about 537.2273992498.

The spelling of 155050961 in words is "one hundred fifty-five million, fifty thousand, nine hundred sixty-one".