155156550 has 96 divisors (see below), whose sum is σ = 404450304. Its totient is φ = 39312000.

The previous prime is 155156537. The next prime is 155156557. The reversal of 155156550 is 55651551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155156557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283377 + ... + 283923.

It is an arithmetic number, because the mean of its divisors is an integer number (4213024).

Almost surely, 2^155156550 is an apocalyptic number.

155156550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155156550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202225152).

155156550 is an abundant number, since it is smaller than the sum of its proper divisors (249293754).

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

155156550 is a wasteful number, since it uses less digits than its factorization.

155156550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 155156550 is about 12456.1852105691. The cubic root of 155156550 is about 537.3493213838.

The spelling of 155156550 in words is "one hundred fifty-five million, one hundred fifty-six thousand, five hundred fifty".