155770825 has 12 divisors (see below), whose sum is σ = 220749760. Its totient is φ = 106814160.

The previous prime is 155770819. The next prime is 155770829. The reversal of 155770825 is 528077551.

It is not a de Polignac number, because 155770825 - 2¹⁷ = 155639753 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (155770829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444885 + ... + 445234.

Almost surely, 2^155770825 is an apocalyptic number.

It is an amenable number.

155770825 is a deficient number, since it is larger than the sum of its proper divisors (64978935).

155770825 is an equidigital number, since it uses as much as digits as its factorization.

155770825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890136 (or 890131 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 40.

The square root of 155770825 is about 12480.8182824685. The cubic root of 155770825 is about 538.0575213853.

The spelling of 155770825 in words is "one hundred fifty-five million, seven hundred seventy thousand, eight hundred twenty-five".