155055897 has 8 divisors (see below), whose sum is σ = 229712480. Its totient is φ = 103370580.

The previous prime is 155055883. The next prime is 155055911. The reversal of 155055897 is 798550551.

155055897 is a `hidden beast` number, since 1 + 5 + 5 + 0 + 558 + 97 = 666.

It is an interprime number because it is at equal distance from previous prime (155055883) and next prime (155055911).

It is not a de Polignac number, because 155055897 - 2⁴ = 155055881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155055847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2871379 + ... + 2871432.

It is an arithmetic number, because the mean of its divisors is an integer number (28714060).

Almost surely, 2^155055897 is an apocalyptic number.

It is an amenable number.

155055897 is a deficient number, since it is larger than the sum of its proper divisors (74656583).

155055897 is an equidigital number, since it uses as much as digits as its factorization.

155055897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742820 (or 5742814 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 45.

The square root of 155055897 is about 12452.1442731764. The cubic root of 155055897 is about 537.2331000127.

The spelling of 155055897 in words is "one hundred fifty-five million, fifty-five thousand, eight hundred ninety-seven".