155432520 has 96 divisors (see below), whose sum is σ = 523897920. Its totient is φ = 41446080.

The previous prime is 155432467. The next prime is 155432531. The reversal of 155432520 is 25234551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1725 + ... + 17715.

It is an arithmetic number, because the mean of its divisors is an integer number (5457270).

Almost surely, 2^155432520 is an apocalyptic number.

155432520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155432520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261948960).

155432520 is an abundant number, since it is smaller than the sum of its proper divisors (368465400).

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

155432520 is a wasteful number, since it uses less digits than its factorization.

155432520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16017 (or 16001 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 155432520 is about 12467.2579182433. The cubic root of 155432520 is about 537.6677190682.

The spelling of 155432520 in words is "one hundred fifty-five million, four hundred thirty-two thousand, five hundred twenty".