155572830 has 48 divisors (see below), whose sum is σ = 462275424. Its totient is φ = 35559360.

The previous prime is 155572811. The next prime is 155572843. The reversal of 155572830 is 38275551.

155572830 is a `hidden beast` number, since 1 + 5 + 5 + 572 + 83 + 0 = 666.

155572830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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, 122841 + ... + 124100.

It is an arithmetic number, because the mean of its divisors is an integer number (9630738).

Almost surely, 2^155572830 is an apocalyptic number.

155572830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155572830 is an abundant number, since it is smaller than the sum of its proper divisors (306702594).

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

155572830 is a wasteful number, since it uses less digits than its factorization.

155572830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246961 (or 246958 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 155572830 is about 12472.8837884428. The cubic root of 155572830 is about 537.8294558548.

It can be divided in two parts, 155 and 572830, that added together give a triangular number (572985 = T₁₀₇₀).

The spelling of 155572830 in words is "one hundred fifty-five million, five hundred seventy-two thousand, eight hundred thirty".