25213114521 has 12 divisors (see below), whose sum is σ = 41621649472. Its totient is φ = 14407493976.

The previous prime is 25213114481. The next prime is 25213114529. The reversal of 25213114521 is 12541131252.

It is a happy number.

25213114521 is a `hidden beast` number, since 2 + 5 + 2 + 131 + 1 + 4 + 521 = 666.

It is not a de Polignac number, because 25213114521 - 2⁷ = 25213114393 is a prime.

It is a super-2 number, since 2×25213114521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25213114529) 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 in 11 ways as a sum of consecutive naturals, for example, 200104021 + ... + 200104146.

Almost surely, 2^25213114521 is an apocalyptic number.

25213114521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25213114521 is a deficient number, since it is larger than the sum of its proper divisors (16408534951).

25213114521 is a wasteful number, since it uses less digits than its factorization.

25213114521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400208180 (or 400208177 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 25213114521 its reverse (12541131252), we get a palindrome (37754245773).

The spelling of 25213114521 in words is "twenty-five billion, two hundred thirteen million, one hundred fourteen thousand, five hundred twenty-one".