155825289 has 45 divisors (see below), whose sum is σ = 249083703. Its totient is φ = 97067808.

The previous prime is 155825287. The next prime is 155825303. The reversal of 155825289 is 982528551.

It is a happy number.

The square root of 155825289 is 12483.

It is a perfect power (a square), and thus also a powerful number.

155825289 is a `hidden beast` number, since 15 + 582 + 52 + 8 + 9 = 666.

155825289 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 88454025 + 67371264 = 9405^2 + 8208^2 .

It is not a de Polignac number, because 155825289 - 2¹ = 155825287 is a prime.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (155825287) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2134557 + ... + 2134629.

Almost surely, 2^155825289 is an apocalyptic number.

155825289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

155825289 is the 12483-rd square number.

155825289 is the 6242-nd centered octagonal number.

It is an amenable number.

155825289 is a deficient number, since it is larger than the sum of its proper divisors (93258414).

155825289 is an frugal number, since it uses more digits than its factorization.

155825289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 95 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The cubic root of 155825289 is about 538.1202232212.

The spelling of 155825289 in words is "one hundred fifty-five million, eight hundred twenty-five thousand, two hundred eighty-nine".