2551857447 has 8 divisors (see below), whose sum is σ = 3445546240. Its totient is φ = 1679703480.

The previous prime is 2551857431. The next prime is 2551857463. The reversal of 2551857447 is 7447581552.

It is an interprime number because it is at equal distance from previous prime (2551857431) and next prime (2551857463).

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

It is not a de Polignac number, because 2551857447 - 2⁴ = 2551857431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2551857396 and 2551857405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551857467) 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, 5383429 + ... + 5383902.

It is an arithmetic number, because the mean of its divisors is an integer number (430693280).

Almost surely, 2^2551857447 is an apocalyptic number.

2551857447 is a deficient number, since it is larger than the sum of its proper divisors (893688793).

2551857447 is a wasteful number, since it uses less digits than its factorization.

2551857447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10767413.

The product of its digits is 1568000, while the sum is 48.

The square root of 2551857447 is about 50515.9128097276. The cubic root of 2551857447 is about 1366.5288450416.

The spelling of 2551857447 in words is "two billion, five hundred fifty-one million, eight hundred fifty-seven thousand, four hundred forty-seven".