155415100 has 18 divisors (see below), whose sum is σ = 337250984. Its totient is φ = 62166000.

The previous prime is 155415077. The next prime is 155415103. The reversal of 155415100 is 1514551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155415103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 776976 + ... + 777175.

Almost surely, 2^155415100 is an apocalyptic number.

155415100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155415100 is an abundant number, since it is smaller than the sum of its proper divisors (181835884).

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

155415100 is a wasteful number, since it uses less digits than its factorization.

155415100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554165 (or 1554158 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 155415100 is about 12466.5592686996. The cubic root of 155415100 is about 537.6476320629.

Adding to 155415100 its reverse (1514551), we get a palindrome (156929651).

The spelling of 155415100 in words is "one hundred fifty-five million, four hundred fifteen thousand, one hundred".