25430516 has 6 divisors (see below), whose sum is σ = 44503410. Its totient is φ = 12715256.

The previous prime is 25430497. The next prime is 25430519. The reversal of 25430516 is 61503452.

It can be written as a sum of positive squares in only one way, i.e., 15570916 + 9859600 = 3946^2 + 3140^2 .

It is a super-2 number, since 2×25430516² = 1293422288052512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3178811 + ... + 3178818.

It is an arithmetic number, because the mean of its divisors is an integer number (7417235).

Almost surely, 2^25430516 is an apocalyptic number.

It is an amenable number.

25430516 is a deficient number, since it is larger than the sum of its proper divisors (19072894).

25430516 is a wasteful number, since it uses less digits than its factorization.

25430516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6357633 (or 6357631 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25430516 is about 5042.8678348733. The cubic root of 25430516 is about 294.0706788592.

Adding to 25430516 its reverse (61503452), we get a palindrome (86933968).

The spelling of 25430516 in words is "twenty-five million, four hundred thirty thousand, five hundred sixteen".