25212653501 has 12 divisors (see below), whose sum is σ = 29353173948. Its totient is φ = 21593037312.

The previous prime is 25212653483. The next prime is 25212653503. The reversal of 25212653501 is 10535621252.

It can be written as a sum of positive squares in 2 ways, for example, as 5524354276 + 19688299225 = 74326^2 + 140315^2 .

It is not a de Polignac number, because 25212653501 - 2¹⁰ = 25212652477 is a prime.

It is a super-2 number, since 2×25212653501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25212653503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151766 + ... + 271031.

It is an arithmetic number, because the mean of its divisors is an integer number (2446097829).

Almost surely, 2^25212653501 is an apocalyptic number.

It is an amenable number.

25212653501 is a deficient number, since it is larger than the sum of its proper divisors (4140520447).

25212653501 is a wasteful number, since it uses less digits than its factorization.

25212653501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424028 (or 424021 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 25212653501 in words is "twenty-five billion, two hundred twelve million, six hundred fifty-three thousand, five hundred one".