155193830 has 32 divisors (see below), whose sum is σ = 305268480. Its totient is φ = 56337120.

The previous prime is 155193827. The next prime is 155193853. The reversal of 155193830 is 38391551.

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, 105641 + ... + 107099.

It is an arithmetic number, because the mean of its divisors is an integer number (9539640).

Almost surely, 2^155193830 is an apocalyptic number.

155193830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155193830 is a deficient number, since it is larger than the sum of its proper divisors (150074650).

155193830 is a wasteful number, since it uses less digits than its factorization.

155193830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 155193830 is about 12457.6815660058. The cubic root of 155193830 is about 537.3923548630.

It can be divided in two parts, 1551 and 93830, that multiplied together give a triangular number (145530330 = T₁₇₀₆₀).

The spelling of 155193830 in words is "one hundred fifty-five million, one hundred ninety-three thousand, eight hundred thirty".