155191146 has 64 divisors (see below), whose sum is σ = 353452032. Its totient is φ = 45000000.

The previous prime is 155191123. The next prime is 155191163. The reversal of 155191146 is 641191551.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206271 + ... + 207021.

It is an arithmetic number, because the mean of its divisors is an integer number (5522688).

Almost surely, 2^155191146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155191146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176726016).

155191146 is an abundant number, since it is smaller than the sum of its proper divisors (198260886).

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

155191146 is a wasteful number, since it uses less digits than its factorization.

155191146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its digits is 5400, while the sum is 33.

The square root of 155191146 is about 12457.5738408408. The cubic root of 155191146 is about 537.3892568675.

The spelling of 155191146 in words is "one hundred fifty-five million, one hundred ninety-one thousand, one hundred forty-six".