155113517 has 4 divisors (see below), whose sum is σ = 167045340. Its totient is φ = 143181696.

The previous prime is 155113507. The next prime is 155113531. The reversal of 155113517 is 715311551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89000356 + 66113161 = 9434^2 + 8131^2 .

It is a cyclic number.

It is not a de Polignac number, because 155113517 - 2⁴ = 155113501 is a prime.

It is a super-2 number, since 2×155113517² = 48120406312218578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155113517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155113507) 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, 5965892 + ... + 5965917.

It is an arithmetic number, because the mean of its divisors is an integer number (41761335).

Almost surely, 2^155113517 is an apocalyptic number.

It is an amenable number.

155113517 is a deficient number, since it is larger than the sum of its proper divisors (11931823).

155113517 is a wasteful number, since it uses less digits than its factorization.

155113517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11931822.

The product of its digits is 2625, while the sum is 29.

The square root of 155113517 is about 12454.4577160148. The cubic root of 155113517 is about 537.2996384636.

The spelling of 155113517 in words is "one hundred fifty-five million, one hundred thirteen thousand, five hundred seventeen".