155023897 has 6 divisors (see below), whose sum is σ = 180333978. Its totient is φ = 132877584.

The previous prime is 155023889. The next prime is 155023903. The reversal of 155023897 is 798320551.

It can be written as a sum of positive squares in only one way, i.e., 150405696 + 4618201 = 12264^2 + 2149^2 .

It is not a de Polignac number, because 155023897 - 2³ = 155023889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155023807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1581828 + ... + 1581925.

It is an arithmetic number, because the mean of its divisors is an integer number (30055663).

Almost surely, 2^155023897 is an apocalyptic number.

It is an amenable number.

155023897 is a deficient number, since it is larger than the sum of its proper divisors (25310081).

155023897 is an equidigital number, since it uses as much as digits as its factorization.

155023897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163767 (or 3163760 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 155023897 is about 12450.8592876155. The cubic root of 155023897 is about 537.1961399178.

The spelling of 155023897 in words is "one hundred fifty-five million, twenty-three thousand, eight hundred ninety-seven".