155111113 has 4 divisors (see below), whose sum is σ = 155144448. Its totient is φ = 155077780.

The previous prime is 155111101. The next prime is 155111137. The reversal of 155111113 is 311111551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155111113 - 2¹³ = 155102921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155111153) 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, 8281 + ... + 19462.

It is an arithmetic number, because the mean of its divisors is an integer number (38786112).

Almost surely, 2^155111113 is an apocalyptic number.

It is an amenable number.

155111113 is a deficient number, since it is larger than the sum of its proper divisors (33335).

155111113 is an equidigital number, since it uses as much as digits as its factorization.

155111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33334.

The product of its digits is 75, while the sum is 19.

The square root of 155111113 is about 12454.3612040120. The cubic root of 155111113 is about 537.2968627008.

Adding to 155111113 its reverse (311111551), we get a palindrome (466222664).

The spelling of 155111113 in words is "one hundred fifty-five million, one hundred eleven thousand, one hundred thirteen".