25143538 has 8 divisors (see below), whose sum is σ = 43103232. Its totient is φ = 10775796.

The previous prime is 25143509. The next prime is 25143539. The reversal of 25143538 is 83534152.

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

It is not an unprimeable number, because it can be changed into a prime (25143539) 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, 897970 + ... + 897997.

It is an arithmetic number, because the mean of its divisors is an integer number (5387904).

Almost surely, 2^25143538 is an apocalyptic number.

25143538 is a deficient number, since it is larger than the sum of its proper divisors (17959694).

25143538 is a wasteful number, since it uses less digits than its factorization.

25143538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795976.

The product of its digits is 14400, while the sum is 31.

The square root of 25143538 is about 5014.3332557779. Note that the first 3 decimals coincide. The cubic root of 25143538 is about 292.9603164309.

The spelling of 25143538 in words is "twenty-five million, one hundred forty-three thousand, five hundred thirty-eight".