155271870 has 128 divisors (see below), whose sum is σ = 460615680. Its totient is φ = 36961920.

The previous prime is 155271841. The next prime is 155271881. The reversal of 155271870 is 78172551.

It is a super-2 number, since 2×155271870² = 48218707226593800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108097 + ... + 109523.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^155271870 is an apocalyptic number.

155271870 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 155271870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230307840).

155271870 is an abundant number, since it is smaller than the sum of its proper divisors (305343810).

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

155271870 is a wasteful number, since it uses less digits than its factorization.

155271870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 155271870 is about 12460.8133763410. The cubic root of 155271870 is about 537.4824165872.

The spelling of 155271870 in words is "one hundred fifty-five million, two hundred seventy-one thousand, eight hundred seventy".