155397198 has 16 divisors (see below), whose sum is σ = 339048576. Its totient is φ = 47090040.

The previous prime is 155397149. The next prime is 155397199. The reversal of 155397198 is 891793551.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155397199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1177186 + ... + 1177317.

It is an arithmetic number, because the mean of its divisors is an integer number (21190536).

Almost surely, 2^155397198 is an apocalyptic number.

155397198 is an abundant number, since it is smaller than the sum of its proper divisors (183651378).

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

155397198 is a wasteful number, since it uses less digits than its factorization.

155397198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354519.

The product of its digits is 340200, while the sum is 48.

The square root of 155397198 is about 12465.8412471842. The cubic root of 155397198 is about 537.6269876993.

The spelling of 155397198 in words is "one hundred fifty-five million, three hundred ninety-seven thousand, one hundred ninety-eight".