155545400 has 48 divisors (see below), whose sum is σ = 380686200. Its totient is φ = 58942080.

The previous prime is 155545387. The next prime is 155545433. The reversal of 155545400 is 4545551.

It is a happy number.

155545400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155545400² = 48388742922320000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16667 + ... + 24266.

Almost surely, 2^155545400 is an apocalyptic number.

155545400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155545400 is an abundant number, since it is smaller than the sum of its proper divisors (225140800).

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

155545400 is a wasteful number, since it uses less digits than its factorization.

155545400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40968 (or 40959 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 155545400 is about 12471.7841546428. The cubic root of 155545400 is about 537.7978446600.

The spelling of 155545400 in words is "one hundred fifty-five million, five hundred forty-five thousand, four hundred".