25229643 has 16 divisors (see below), whose sum is σ = 35769600. Its totient is φ = 15782624.

The previous prime is 25229641. The next prime is 25229653. The reversal of 25229643 is 34692252.

It is a cyclic number.

It is not a de Polignac number, because 25229643 - 2¹ = 25229641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25229641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208 + ... + 7106.

It is an arithmetic number, because the mean of its divisors is an integer number (2235600).

Almost surely, 2^25229643 is an apocalyptic number.

25229643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25229643 is a deficient number, since it is larger than the sum of its proper divisors (10539957).

25229643 is a wasteful number, since it uses less digits than its factorization.

25229643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978.

The product of its digits is 25920, while the sum is 33.

The square root of 25229643 is about 5022.9118049195. The cubic root of 25229643 is about 293.2943533201.

The spelling of 25229643 in words is "twenty-five million, two hundred twenty-nine thousand, six hundred forty-three".