155242525 has 12 divisors (see below), whose sum is σ = 200871072. Its totient is φ = 118793840.

The previous prime is 155242519. The next prime is 155242531. The reversal of 155242525 is 525242551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155242519) and next prime (155242531).

It is not a de Polignac number, because 155242525 - 2³ = 155242517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134419 + ... + 135568.

It is an arithmetic number, because the mean of its divisors is an integer number (16739256).

Almost surely, 2^155242525 is an apocalyptic number.

It is an amenable number.

155242525 is a deficient number, since it is larger than the sum of its proper divisors (45628547).

155242525 is a wasteful number, since it uses less digits than its factorization.

155242525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270020 (or 270015 counting only the distinct ones).

The product of its digits is 20000, while the sum is 31.

The square root of 155242525 is about 12459.6358293491. The cubic root of 155242525 is about 537.4485546580.

The spelling of 155242525 in words is "one hundred fifty-five million, two hundred forty-two thousand, five hundred twenty-five".