155115450 has 144 divisors (see below), whose sum is σ = 497218176. Its totient is φ = 33897600.

The previous prime is 155115431. The next prime is 155115469. The reversal of 155115450 is 54511551.

It is an interprime number because it is at equal distance from previous prime (155115431) and next prime (155115469).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 71380 + ... + 73520.

It is an arithmetic number, because the mean of its divisors is an integer number (3452904).

Almost surely, 2^155115450 is an apocalyptic number.

155115450 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 155115450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248609088).

155115450 is an abundant number, since it is smaller than the sum of its proper divisors (342102726).

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

155115450 is a wasteful number, since it uses less digits than its factorization.

155115450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 155115450 is about 12454.5353185095. The cubic root of 155115450 is about 537.3018703686.

The spelling of 155115450 in words is "one hundred fifty-five million, one hundred fifteen thousand, four hundred fifty".