155542530 has 96 divisors (see below), whose sum is σ = 441132480. Its totient is φ = 34794240.

The previous prime is 155542523. The next prime is 155542549. The reversal of 155542530 is 35245551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54376 + ... + 57164.

It is an arithmetic number, because the mean of its divisors is an integer number (4595130).

Almost surely, 2^155542530 is an apocalyptic number.

155542530 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 155542530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220566240).

155542530 is an abundant number, since it is smaller than the sum of its proper divisors (285589950).

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

155542530 is a wasteful number, since it uses less digits than its factorization.

155542530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 155542530 is about 12471.6690943915. The cubic root of 155542530 is about 537.7945369669.

The spelling of 155542530 in words is "one hundred fifty-five million, five hundred forty-two thousand, five hundred thirty".