81925263 has 24 divisors (see below), whose sum is σ = 140253568. Its totient is φ = 46813464.

The previous prime is 81925247. The next prime is 81925279. The reversal of 81925263 is 36252918.

It is an interprime number because it is at equal distance from previous prime (81925247) and next prime (81925279).

It is not a de Polignac number, because 81925263 - 2⁴ = 81925247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81925213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22381 + ... + 25782.

Almost surely, 2^81925263 is an apocalyptic number.

81925263 is a deficient number, since it is larger than the sum of its proper divisors (58328305).

81925263 is an equidigital number, since it uses as much as digits as its factorization.

81925263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48185 (or 48173 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 81925263 is about 9051.2575369393. The cubic root of 81925263 is about 434.3161192242.

The spelling of 81925263 in words is "eighty-one million, nine hundred twenty-five thousand, two hundred sixty-three".