2551383947 has 8 divisors (see below), whose sum is σ = 2941672416. Its totient is φ = 2167546752.

The previous prime is 2551383943. The next prime is 2551383949. The reversal of 2551383947 is 7493831552.

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

It is not a de Polignac number, because 2551383947 - 2² = 2551383943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551383941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611968 + ... + 1613549.

It is an arithmetic number, because the mean of its divisors is an integer number (367709052).

Almost surely, 2^2551383947 is an apocalyptic number.

2551383947 is a deficient number, since it is larger than the sum of its proper divisors (390288469).

2551383947 is a wasteful number, since it uses less digits than its factorization.

2551383947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225637.

The product of its digits is 907200, while the sum is 47.

The square root of 2551383947 is about 50511.2259502776. The cubic root of 2551383947 is about 1366.4443194955. Note that the first 3 decimals are identical.

The spelling of 2551383947 in words is "two billion, five hundred fifty-one million, three hundred eighty-three thousand, nine hundred forty-seven".