2115401569 has 2 divisors, whose sum is σ = 2115401570. Its totient is φ = 2115401568.

The previous prime is 2115401551. The next prime is 2115401597. The reversal of 2115401569 is 9651045112.

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., 1429747344 + 685654225 = 37812^2 + 26185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115401569 - 2⁷ = 2115401441 is a prime.

It is a super-2 number, since 2×2115401569² = 8949847596255323522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2115401599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057700784 + 1057700785.

It is an arithmetic number, because the mean of its divisors is an integer number (1057700785).

Almost surely, 2^2115401569 is an apocalyptic number.

It is an amenable number.

2115401569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115401569 is an equidigital number, since it uses as much as digits as its factorization.

2115401569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 2115401569 is about 45993.4948552510. The cubic root of 2115401569 is about 1283.7021661553.

The spelling of 2115401569 in words is "two billion, one hundred fifteen million, four hundred one thousand, five hundred sixty-nine".