155630025 has 24 divisors (see below), whose sum is σ = 285899360. Its totient is φ = 83002320.

The previous prime is 155630021. The next prime is 155630039. The reversal of 155630025 is 520036551.

155630025 is a `hidden beast` number, since 1 + 5 + 5 + 630 + 0 + 25 = 666.

155630025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155630025 - 2² = 155630021 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155630021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114607 + ... + 115956.

Almost surely, 2^155630025 is an apocalyptic number.

155630025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155630025 is a deficient number, since it is larger than the sum of its proper divisors (130269335).

155630025 is a wasteful number, since it uses less digits than its factorization.

155630025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230582 (or 230571 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 155630025 is about 12475.1763514589. The cubic root of 155630025 is about 537.8953572224.

Adding to 155630025 its reverse (520036551), we get a palindrome (675666576).

The spelling of 155630025 in words is "one hundred fifty-five million, six hundred thirty thousand, twenty-five".