25228511971 has 8 divisors (see below), whose sum is σ = 27172690160. Its totient is φ = 23284837152.

The previous prime is 25228511951. The next prime is 25228512011. The reversal of 25228511971 is 17911582252.

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 25228511971 - 2¹¹ = 25228509923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25228511911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18336 + ... + 225373.

It is an arithmetic number, because the mean of its divisors is an integer number (3396586270).

Almost surely, 2^25228511971 is an apocalyptic number.

25228511971 is a deficient number, since it is larger than the sum of its proper divisors (1944178189).

25228511971 is a wasteful number, since it uses less digits than its factorization.

25228511971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251685.

The product of its digits is 100800, while the sum is 43.

The spelling of 25228511971 in words is "twenty-five billion, two hundred twenty-eight million, five hundred eleven thousand, nine hundred seventy-one".