47751331 has 2 divisors, whose sum is σ = 47751332. Its totient is φ = 47751330.

The previous prime is 47751329. The next prime is 47751343. The reversal of 47751331 is 13315774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47751331 - 2¹ = 47751329 is a prime.

It is a super-2 number, since 2×47751331² = 4560379224543122, which contains 22 as substring.

Together with 47751329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 47751293 and 47751302.

It is not a weakly prime, because it can be changed into another prime (47751391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23875665 + 23875666.

It is an arithmetic number, because the mean of its divisors is an integer number (23875666).

Almost surely, 2^47751331 is an apocalyptic number.

47751331 is a deficient number, since it is larger than the sum of its proper divisors (1).

47751331 is an equidigital number, since it uses as much as digits as its factorization.

47751331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 31.

The square root of 47751331 is about 6910.2337876515. The cubic root of 47751331 is about 362.7954461781.

The spelling of 47751331 in words is "forty-seven million, seven hundred fifty-one thousand, three hundred thirty-one".