155575151 has 4 divisors (see below), whose sum is σ = 162339312. Its totient is φ = 148810992.

The previous prime is 155575141. The next prime is 155575157. The reversal of 155575151 is 151575551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155575151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155575157) 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, 3382046 + ... + 3382091.

It is an arithmetic number, because the mean of its divisors is an integer number (40584828).

Almost surely, 2^155575151 is an apocalyptic number.

155575151 is a deficient number, since it is larger than the sum of its proper divisors (6764161).

155575151 is an equidigital number, since it uses as much as digits as its factorization.

155575151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764160.

The product of its digits is 21875, while the sum is 35.

The square root of 155575151 is about 12472.9768299312. The cubic root of 155575151 is about 537.8321304777.

The spelling of 155575151 in words is "one hundred fifty-five million, five hundred seventy-five thousand, one hundred fifty-one".