47851381 has 2 divisors, whose sum is σ = 47851382. Its totient is φ = 47851380.

The previous prime is 47851369. The next prime is 47851423. The reversal of 47851381 is 18315874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 654481 = 6870^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 47851381 - 2¹³ = 47843189 is a prime.

It is a super-2 number, since 2×47851381² = 4579509327214322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47851381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47851351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23925690 + 23925691.

It is an arithmetic number, because the mean of its divisors is an integer number (23925691).

Almost surely, 2^47851381 is an apocalyptic number.

It is an amenable number.

47851381 is a deficient number, since it is larger than the sum of its proper divisors (1).

47851381 is an equidigital number, since it uses as much as digits as its factorization.

47851381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 47851381 is about 6917.4692626711. The cubic root of 47851381 is about 363.0486493345.

The spelling of 47851381 in words is "forty-seven million, eight hundred fifty-one thousand, three hundred eighty-one".