116155621 has 2 divisors, whose sum is σ = 116155622. Its totient is φ = 116155620.

The previous prime is 116155619. The next prime is 116155639. The reversal of 116155621 is 126551611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70795396 + 45360225 = 8414^2 + 6735^2 .

It is a cyclic number.

It is not a de Polignac number, because 116155621 - 2¹ = 116155619 is a prime.

Together with 116155619, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 116155621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116155661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58077810 + 58077811.

It is an arithmetic number, because the mean of its divisors is an integer number (58077811).

Almost surely, 2^116155621 is an apocalyptic number.

It is an amenable number.

116155621 is a deficient number, since it is larger than the sum of its proper divisors (1).

116155621 is an equidigital number, since it uses as much as digits as its factorization.

116155621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 28.

The square root of 116155621 is about 10777.5517164150. The cubic root of 116155621 is about 487.9178915986.

The spelling of 116155621 in words is "one hundred sixteen million, one hundred fifty-five thousand, six hundred twenty-one".