155521150 has 12 divisors (see below), whose sum is σ = 289269432. Its totient is φ = 62208440.

The previous prime is 155521139. The next prime is 155521187. The reversal of 155521150 is 51125551.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1555162 + ... + 1555261.

It is an arithmetic number, because the mean of its divisors is an integer number (24105786).

Almost surely, 2^155521150 is an apocalyptic number.

155521150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155521150 is a deficient number, since it is larger than the sum of its proper divisors (133748282).

155521150 is a wasteful number, since it uses less digits than its factorization.

155521150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110435 (or 3110430 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 155521150 is about 12470.8119222447. The cubic root of 155521150 is about 537.7698951020.

The spelling of 155521150 in words is "one hundred fifty-five million, five hundred twenty-one thousand, one hundred fifty".