155153139 has 4 divisors (see below), whose sum is σ = 206870856. Its totient is φ = 103435424.

The previous prime is 155153137. The next prime is 155153179. The reversal of 155153139 is 931351551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155153139 - 2¹ = 155153137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155153137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25858854 + ... + 25858859.

It is an arithmetic number, because the mean of its divisors is an integer number (51717714).

Almost surely, 2^155153139 is an apocalyptic number.

155153139 is a deficient number, since it is larger than the sum of its proper divisors (51717717).

155153139 is an equidigital number, since it uses as much as digits as its factorization.

155153139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51717716.

The product of its digits is 10125, while the sum is 33.

The square root of 155153139 is about 12456.0482898871. The cubic root of 155153139 is about 537.3453836148.

The spelling of 155153139 in words is "one hundred fifty-five million, one hundred fifty-three thousand, one hundred thirty-nine".