115943551 has 2 divisors, whose sum is σ = 115943552. Its totient is φ = 115943550.

The previous prime is 115943543. The next prime is 115943557. The reversal of 115943551 is 155349511.

It is a strong prime.

It is an emirp because it is prime and its reverse (155349511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115943551 - 2³ = 115943543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115943557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57971775 + 57971776.

It is an arithmetic number, because the mean of its divisors is an integer number (57971776).

Almost surely, 2^115943551 is an apocalyptic number.

115943551 is a deficient number, since it is larger than the sum of its proper divisors (1).

115943551 is an equidigital number, since it uses as much as digits as its factorization.

115943551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 34.

The square root of 115943551 is about 10767.7087163426. The cubic root of 115943551 is about 487.6207735835.

The spelling of 115943551 in words is "one hundred fifteen million, nine hundred forty-three thousand, five hundred fifty-one".