155201520 has 80 divisors (see below), whose sum is σ = 491397120. Its totient is φ = 40503552.

The previous prime is 155201513. The next prime is 155201537. The reversal of 155201520 is 25102551.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4401 + ... + 18159.

It is an arithmetic number, because the mean of its divisors is an integer number (6142464).

Almost surely, 2^155201520 is an apocalyptic number.

155201520 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 155201520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245698560).

155201520 is an abundant number, since it is smaller than the sum of its proper divisors (336195600).

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

155201520 is a wasteful number, since it uses less digits than its factorization.

155201520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13822 (or 13816 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 155201520 is about 12457.9902070920. The cubic root of 155201520 is about 537.4012308150.

The spelling of 155201520 in words is "one hundred fifty-five million, two hundred one thousand, five hundred twenty".