155551113 has 6 divisors (see below), whose sum is σ = 224684954. Its totient is φ = 103700736.

The previous prime is 155551091. The next prime is 155551117. The reversal of 155551113 is 311155551.

It can be written as a sum of positive squares in only one way, i.e., 130028409 + 25522704 = 11403^2 + 5052^2 .

It is not a de Polignac number, because 155551113 - 2¹⁰ = 155550089 is a prime.

It is a super-2 number, since 2×155551113² = 48392297511077538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155551117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8641720 + ... + 8641737.

Almost surely, 2^155551113 is an apocalyptic number.

It is an amenable number.

155551113 is a deficient number, since it is larger than the sum of its proper divisors (69133841).

155551113 is a wasteful number, since it uses less digits than its factorization.

155551113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17283463 (or 17283460 counting only the distinct ones).

The product of its digits is 1875, while the sum is 27.

The square root of 155551113 is about 12472.0131895376. The cubic root of 155551113 is about 537.8044288073.

The spelling of 155551113 in words is "one hundred fifty-five million, five hundred fifty-one thousand, one hundred thirteen".