155620025 has 12 divisors (see below), whose sum is σ = 210511824. Its totient is φ = 113178000.

The previous prime is 155620021. The next prime is 155620027. The reversal of 155620025 is 520026551.

It is not a de Polignac number, because 155620025 - 2² = 155620021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155619976 and 155620003.

It is not an unprimeable number, because it can be changed into a prime (155620021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282671 + ... + 283220.

It is an arithmetic number, because the mean of its divisors is an integer number (17542652).

Almost surely, 2^155620025 is an apocalyptic number.

It is an amenable number.

155620025 is a deficient number, since it is larger than the sum of its proper divisors (54891799).

155620025 is a wasteful number, since it uses less digits than its factorization.

155620025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565912 (or 565907 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 155620025 is about 12474.7755490830. The cubic root of 155620025 is about 537.8838361620.

Adding to 155620025 its reverse (520026551), we get a palindrome (675646576).

The spelling of 155620025 in words is "one hundred fifty-five million, six hundred twenty thousand, twenty-five".