155561151 has 8 divisors (see below), whose sum is σ = 218331520. Its totient is φ = 98249112.

The previous prime is 155561137. The next prime is 155561179. The reversal of 155561151 is 151165551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155561151 - 2¹⁰ = 155560127 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 (155561051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1364515 + ... + 1364628.

It is an arithmetic number, because the mean of its divisors is an integer number (27291440).

Almost surely, 2^155561151 is an apocalyptic number.

155561151 is a deficient number, since it is larger than the sum of its proper divisors (62770369).

155561151 is a wasteful number, since it uses less digits than its factorization.

155561151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729165.

The product of its digits is 3750, while the sum is 30.

The square root of 155561151 is about 12472.4156040440. The cubic root of 155561151 is about 537.8159970621.

The spelling of 155561151 in words is "one hundred fifty-five million, five hundred sixty-one thousand, one hundred fifty-one".