25530481 has 12 divisors (see below), whose sum is σ = 27807948. Its totient is φ = 23357952.

The previous prime is 25530403. The next prime is 25530493. The reversal of 25530481 is 18403552.

It can be written as a sum of positive squares in 6 ways, for example, as 5683456 + 19847025 = 2384^2 + 4455^2 .

It is not a de Polignac number, because 25530481 - 2¹⁵ = 25497713 is a prime.

It is a super-2 number, since 2×25530481² = 1303610920182722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25530581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22725 + ... + 23821.

It is an arithmetic number, because the mean of its divisors is an integer number (2317329).

Almost surely, 2^25530481 is an apocalyptic number.

It is an amenable number.

25530481 is a deficient number, since it is larger than the sum of its proper divisors (2277467).

25530481 is a wasteful number, since it uses less digits than its factorization.

25530481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 25530481 is about 5052.7696365459. The cubic root of 25530481 is about 294.4554965934.

The spelling of 25530481 in words is "twenty-five million, five hundred thirty thousand, four hundred eighty-one".