155394257 has 8 divisors (see below), whose sum is σ = 157912320. Its totient is φ = 152895600.

The previous prime is 155394247. The next prime is 155394271. The reversal of 155394257 is 752493551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155394257 - 2¹⁶ = 155328721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155394247) 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, 11744 + ... + 21182.

It is an arithmetic number, because the mean of its divisors is an integer number (19739040).

Almost surely, 2^155394257 is an apocalyptic number.

It is an amenable number.

155394257 is a deficient number, since it is larger than the sum of its proper divisors (2518063).

155394257 is a wasteful number, since it uses less digits than its factorization.

155394257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9703.

The product of its digits is 189000, while the sum is 41.

The square root of 155394257 is about 12465.7232842704. The cubic root of 155394257 is about 537.6235960230.

The spelling of 155394257 in words is "one hundred fifty-five million, three hundred ninety-four thousand, two hundred fifty-seven".