155497238 has 12 divisors (see below), whose sum is σ = 252568548. Its totient is φ = 71767800.

The previous prime is 155497229. The next prime is 155497241. The reversal of 155497238 is 832794551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229688 + ... + 230363.

It is an arithmetic number, because the mean of its divisors is an integer number (21047379).

Almost surely, 2^155497238 is an apocalyptic number.

155497238 is a deficient number, since it is larger than the sum of its proper divisors (97071310).

155497238 is a wasteful number, since it uses less digits than its factorization.

155497238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460079 (or 460066 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 155497238 is about 12469.8531667378. The cubic root of 155497238 is about 537.7423322639.

The spelling of 155497238 in words is "one hundred fifty-five million, four hundred ninety-seven thousand, two hundred thirty-eight".