25516534 has 8 divisors (see below), whose sum is σ = 39509568. Its totient is φ = 12346680.

The previous prime is 25516511. The next prime is 25516537. The reversal of 25516534 is 43561552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 25516496 and 25516505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25516537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205717 + ... + 205840.

It is an arithmetic number, because the mean of its divisors is an integer number (4938696).

Almost surely, 2^25516534 is an apocalyptic number.

25516534 is a deficient number, since it is larger than the sum of its proper divisors (13993034).

25516534 is a wasteful number, since it uses less digits than its factorization.

25516534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411590.

The product of its digits is 18000, while the sum is 31.

The square root of 25516534 is about 5051.3893138423. The cubic root of 25516534 is about 294.4018676409.

The spelling of 25516534 in words is "twenty-five million, five hundred sixteen thousand, five hundred thirty-four".