113871511 has 4 divisors (see below), whose sum is σ = 122630872. Its totient is φ = 105112152.

The previous prime is 113871509. The next prime is 113871539. The reversal of 113871511 is 115178311.

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

It is a cyclic number.

It is not a de Polignac number, because 113871511 - 2¹ = 113871509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113871511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113874511) 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, 4379661 + ... + 4379686.

It is an arithmetic number, because the mean of its divisors is an integer number (30657718).

Almost surely, 2^113871511 is an apocalyptic number.

113871511 is a deficient number, since it is larger than the sum of its proper divisors (8759361).

113871511 is an equidigital number, since it uses as much as digits as its factorization.

113871511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759360.

The product of its digits is 840, while the sum is 28.

The square root of 113871511 is about 10671.0595069093. The cubic root of 113871511 is about 484.6985209665.

The spelling of 113871511 in words is "one hundred thirteen million, eight hundred seventy-one thousand, five hundred eleven".