116138521 has 4 divisors (see below), whose sum is σ = 116194000. Its totient is φ = 116083044.

The previous prime is 116138489. The next prime is 116138563. The reversal of 116138521 is 125831611.

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 116138521 - 2⁵ = 116138489 is a prime.

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 116138521.

It is not an unprimeable number, because it can be changed into a prime (116138221) 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, 24471 + ... + 28828.

It is an arithmetic number, because the mean of its divisors is an integer number (29048500).

Almost surely, 2^116138521 is an apocalyptic number.

It is an amenable number.

116138521 is a deficient number, since it is larger than the sum of its proper divisors (55479).

116138521 is an equidigital number, since it uses as much as digits as its factorization.

116138521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55478.

The product of its digits is 1440, while the sum is 28.

The square root of 116138521 is about 10776.7583716069. The cubic root of 116138521 is about 487.8939472690.

The spelling of 116138521 in words is "one hundred sixteen million, one hundred thirty-eight thousand, five hundred twenty-one".