155725140 has 48 divisors (see below), whose sum is σ = 458982720. Its totient is φ = 39340800.

The previous prime is 155725127. The next prime is 155725177. The reversal of 155725140 is 41527551.

155725140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 155725098 and 155725107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67161 + ... + 69440.

It is an arithmetic number, because the mean of its divisors is an integer number (9562140).

Almost surely, 2^155725140 is an apocalyptic number.

155725140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155725140 is an abundant number, since it is smaller than the sum of its proper divisors (303257580).

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

155725140 is a wasteful number, since it uses less digits than its factorization.

155725140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136632 (or 136630 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 155725140 is about 12478.9879397329. The cubic root of 155725140 is about 538.0049151258.

The spelling of 155725140 in words is "one hundred fifty-five million, seven hundred twenty-five thousand, one hundred forty".