155155400 has 24 divisors (see below), whose sum is σ = 360736770. Its totient is φ = 62062080.

The previous prime is 155155313. The next prime is 155155409. The reversal of 155155400 is 4551551.

It can be written as a sum of positive squares in 3 ways, for example, as 148693636 + 6461764 = 12194^2 + 2542^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155155400.

It is not an unprimeable number, because it can be changed into a prime (155155409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387689 + ... + 388088.

Almost surely, 2^155155400 is an apocalyptic number.

155155400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155155400 is an abundant number, since it is smaller than the sum of its proper divisors (205581370).

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

155155400 is a wasteful number, since it uses less digits than its factorization.

155155400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775793 (or 775784 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 155155400 is about 12456.1390486780. The cubic root of 155155400 is about 537.3479937930.

The spelling of 155155400 in words is "one hundred fifty-five million, one hundred fifty-five thousand, four hundred".