155404250 has 16 divisors (see below), whose sum is σ = 290917224. Its totient is φ = 62161600.

The previous prime is 155404241. The next prime is 155404273. The reversal of 155404250 is 52404551.

155404250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5121169 + 150283081 = 2263^2 + 12259^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310559 + ... + 311058.

Almost surely, 2^155404250 is an apocalyptic number.

155404250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155404250 is a deficient number, since it is larger than the sum of its proper divisors (135512974).

155404250 is an equidigital number, since it uses as much as digits as its factorization.

155404250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621634 (or 621624 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 155404250 is about 12466.1240969276. The cubic root of 155404250 is about 537.6351201672.

The spelling of 155404250 in words is "one hundred fifty-five million, four hundred four thousand, two hundred fifty".