155103550 has 24 divisors (see below), whose sum is σ = 329706576. Its totient is φ = 53178240.

The previous prime is 155103523. The next prime is 155103551. The reversal of 155103550 is 55301551.

155103550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155103550² = 48114222445205000, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155103551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221227 + ... + 221926.

It is an arithmetic number, because the mean of its divisors is an integer number (13737774).

Almost surely, 2^155103550 is an apocalyptic number.

155103550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155103550 is an abundant number, since it is smaller than the sum of its proper divisors (174603026).

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

155103550 is a wasteful number, since it uses less digits than its factorization.

155103550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443172 (or 443167 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 155103550 is about 12454.0575717314. The cubic root of 155103550 is about 537.2881299454.

The spelling of 155103550 in words is "one hundred fifty-five million, one hundred three thousand, five hundred fifty".