2505621451 has 2 divisors, whose sum is σ = 2505621452. Its totient is φ = 2505621450.

The previous prime is 2505621427. The next prime is 2505621557. The reversal of 2505621451 is 1541265052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2505621451 - 2⁷ = 2505621323 is a prime.

It is a super-2 number, since 2×2505621451² = 12556277711422690802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2505621401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252810725 + 1252810726.

It is an arithmetic number, because the mean of its divisors is an integer number (1252810726).

Almost surely, 2^2505621451 is an apocalyptic number.

2505621451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505621451 is an equidigital number, since it uses as much as digits as its factorization.

2505621451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2505621451 is about 50056.1829447672. The cubic root of 2505621451 is about 1358.2253111566.

The spelling of 2505621451 in words is "two billion, five hundred five million, six hundred twenty-one thousand, four hundred fifty-one".