51847481 has 16 divisors (see below), whose sum is σ = 60527616. Its totient is φ = 43495056.

The previous prime is 51847427. The next prime is 51847483. The reversal of 51847481 is 18474815.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51847481 is a prime.

It is a super-2 number, since 2×51847481² = 5376322572090722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51847483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106220 + ... + 106706.

It is an arithmetic number, because the mean of its divisors is an integer number (3782976).

Almost surely, 2^51847481 is an apocalyptic number.

It is an amenable number.

51847481 is a deficient number, since it is larger than the sum of its proper divisors (8680135).

51847481 is a wasteful number, since it uses less digits than its factorization.

51847481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its digits is 35840, while the sum is 38.

The square root of 51847481 is about 7200.5194951476. The cubic root of 51847481 is about 372.8858359678.

The spelling of 51847481 in words is "fifty-one million, eight hundred forty-seven thousand, four hundred eighty-one".