155231255 has 16 divisors (see below), whose sum is σ = 194719680. Its totient is φ = 118576128.

The previous prime is 155231227. The next prime is 155231261. The reversal of 155231255 is 552132551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155231255 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106109 + ... + 107561.

It is an arithmetic number, because the mean of its divisors is an integer number (12169980).

Almost surely, 2^155231255 is an apocalyptic number.

155231255 is a deficient number, since it is larger than the sum of its proper divisors (39488425).

155231255 is a wasteful number, since it uses less digits than its factorization.

155231255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410.

The product of its digits is 7500, while the sum is 29.

The square root of 155231255 is about 12459.1835607314. The cubic root of 155231255 is about 537.4355487891.

The spelling of 155231255 in words is "one hundred fifty-five million, two hundred thirty-one thousand, two hundred fifty-five".