155393225 has 24 divisors (see below), whose sum is σ = 208111680. Its totient is φ = 114419520.

The previous prime is 155393219. The next prime is 155393261. The reversal of 155393225 is 522393551.

It is a de Polignac number, because none of the positive numbers 2^k-155393225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209906 + ... + 210644.

It is an arithmetic number, because the mean of its divisors is an integer number (8671320).

Almost surely, 2^155393225 is an apocalyptic number.

It is an amenable number.

155393225 is a deficient number, since it is larger than the sum of its proper divisors (52718455).

155393225 is a wasteful number, since it uses less digits than its factorization.

155393225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409 (or 1404 counting only the distinct ones).

The product of its digits is 40500, while the sum is 35.

The square root of 155393225 is about 12465.6818906949. The cubic root of 155393225 is about 537.6224058701.

The spelling of 155393225 in words is "one hundred fifty-five million, three hundred ninety-three thousand, two hundred twenty-five".