155256100 has 18 divisors (see below), whose sum is σ = 336905954. Its totient is φ = 62102400.

The previous prime is 155256097. The next prime is 155256109. The reversal of 155256100 is 1652551.

It can be written as a sum of positive squares in 3 ways, for example, as 10342656 + 144913444 = 3216^2 + 12038^2 .

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

It is not an unprimeable number, because it can be changed into a prime (155256109) 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, 776181 + ... + 776380.

Almost surely, 2^155256100 is an apocalyptic number.

155256100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155256100 is an abundant number, since it is smaller than the sum of its proper divisors (181649854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155256100 is a wasteful number, since it uses less digits than its factorization.

155256100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552575 (or 1552568 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 155256100 is about 12460.1805765406. The cubic root of 155256100 is about 537.4642197203.

The spelling of 155256100 in words is "one hundred fifty-five million, two hundred fifty-six thousand, one hundred".