2521132447 has 2 divisors, whose sum is σ = 2521132448. Its totient is φ = 2521132446.

The previous prime is 2521132349. The next prime is 2521132457. The reversal of 2521132447 is 7442311252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521132447 - 2²³ = 2512743839 is a prime.

It is a super-2 number, since 2×2521132447² = 12712217630632415618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521132457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260566223 + 1260566224.

It is an arithmetic number, because the mean of its divisors is an integer number (1260566224).

Almost surely, 2^2521132447 is an apocalyptic number.

2521132447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521132447 is an equidigital number, since it uses as much as digits as its factorization.

2521132447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 31.

The square root of 2521132447 is about 50210.8797672377. The cubic root of 2521132447 is about 1361.0222358834.

Adding to 2521132447 its reverse (7442311252), we get a palindrome (9963443699).

The spelling of 2521132447 in words is "two billion, five hundred twenty-one million, one hundred thirty-two thousand, four hundred forty-seven".