25821316 has 6 divisors (see below), whose sum is σ = 45187310. Its totient is φ = 12910656.

The previous prime is 25821307. The next prime is 25821329. The reversal of 25821316 is 61312852.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 4161600 = 4654^2 + 2040^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227661 + ... + 3227668.

Almost surely, 2^25821316 is an apocalyptic number.

It is an amenable number.

25821316 is a deficient number, since it is larger than the sum of its proper divisors (19365994).

25821316 is a wasteful number, since it uses less digits than its factorization.

25821316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455333 (or 6455331 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 25821316 is about 5081.4678981570. The cubic root of 25821316 is about 295.5693915253.

The spelling of 25821316 in words is "twenty-five million, eight hundred twenty-one thousand, three hundred sixteen".