21025062525 has 12 divisors (see below), whose sum is σ = 34761436832. Its totient is φ = 11213366640.

The previous prime is 21025062467. The next prime is 21025062551. The reversal of 21025062525 is 52526052012.

It is not a de Polignac number, because 21025062525 - 2¹⁶ = 21024996989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21025062492 and 21025062501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140167009 + ... + 140167158.

Almost surely, 2^21025062525 is an apocalyptic number.

21025062525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21025062525 is a deficient number, since it is larger than the sum of its proper divisors (13736374307).

21025062525 is a wasteful number, since it uses less digits than its factorization.

21025062525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280334180 (or 280334175 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21025062525 in words is "twenty-one billion, twenty-five million, sixty-two thousand, five hundred twenty-five".