2521423501 has 2 divisors, whose sum is σ = 2521423502. Its totient is φ = 2521423500.

The previous prime is 2521423447. The next prime is 2521423607. The reversal of 2521423501 is 1053241252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1727649225 + 793774276 = 41565^2 + 28174^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521423501 - 2¹⁵ = 2521390733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521223501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260711750 + 1260711751.

It is an arithmetic number, because the mean of its divisors is an integer number (1260711751).

Almost surely, 2^2521423501 is an apocalyptic number.

It is an amenable number.

2521423501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521423501 is an equidigital number, since it uses as much as digits as its factorization.

2521423501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2521423501 is about 50213.7779996686. Note that the first 3 decimals coincide. The cubic root of 2521423501 is about 1361.0746086076.

Adding to 2521423501 its reverse (1053241252), we get a palindrome (3574664753).

The spelling of 2521423501 in words is "two billion, five hundred twenty-one million, four hundred twenty-three thousand, five hundred one".