25551947 has 2 divisors, whose sum is σ = 25551948. Its totient is φ = 25551946.

The previous prime is 25551937. The next prime is 25551959. The reversal of 25551947 is 74915552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25551947 - 2¹⁰ = 25550923 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25551947.

It is not a weakly prime, because it can be changed into another prime (25551937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775973 + 12775974.

It is an arithmetic number, because the mean of its divisors is an integer number (12775974).

Almost surely, 2^25551947 is an apocalyptic number.

25551947 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551947 is an equidigital number, since it uses as much as digits as its factorization.

25551947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 38.

The square root of 25551947 is about 5054.8933717735. The cubic root of 25551947 is about 294.5379994262.

The spelling of 25551947 in words is "twenty-five million, five hundred fifty-one thousand, nine hundred forty-seven".