155112400 has 30 divisors (see below), whose sum is σ = 372658502. Its totient is φ = 62044800.

The previous prime is 155112383. The next prime is 155112401. The reversal of 155112400 is 4211551.

It can be written as a sum of positive squares in 3 ways, for example, as 27331984 + 127780416 = 5228^2 + 11304^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155112401) 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, 193491 + ... + 194290.

Almost surely, 2^155112400 is an apocalyptic number.

155112400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155112400 is an abundant number, since it is smaller than the sum of its proper divisors (217546102).

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

155112400 is a wasteful number, since it uses less digits than its factorization.

155112400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387799 (or 387788 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 155112400 is about 12454.4128725524. The cubic root of 155112400 is about 537.2983487305.

Adding to 155112400 its reverse (4211551), we get a palindrome (159323951).

The spelling of 155112400 in words is "one hundred fifty-five million, one hundred twelve thousand, four hundred".