25151971 has 8 divisors (see below), whose sum is σ = 27819344. Its totient is φ = 22589280.

The previous prime is 25151933. The next prime is 25152013. The reversal of 25151971 is 17915152.

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

It is a cyclic number.

It is not a de Polignac number, because 25151971 - 2⁷ = 25151843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25151171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25665 + ... + 26626.

It is an arithmetic number, because the mean of its divisors is an integer number (3477418).

Almost surely, 2^25151971 is an apocalyptic number.

25151971 is a deficient number, since it is larger than the sum of its proper divisors (2667373).

25151971 is a wasteful number, since it uses less digits than its factorization.

25151971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52341.

The product of its digits is 3150, while the sum is 31.

The square root of 25151971 is about 5015.1740747456. The cubic root of 25151971 is about 292.9930651793.

The spelling of 25151971 in words is "twenty-five million, one hundred fifty-one thousand, nine hundred seventy-one".