47193281 has 2 divisors, whose sum is σ = 47193282. Its totient is φ = 47193280.

The previous prime is 47193277. The next prime is 47193301. The reversal of 47193281 is 18239174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37945600 + 9247681 = 6160^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 47193281 - 2² = 47193277 is a prime.

It is a super-2 number, since 2×47193281² = 4454411543089922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47193221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23596640 + 23596641.

It is an arithmetic number, because the mean of its divisors is an integer number (23596641).

Almost surely, 2^47193281 is an apocalyptic number.

It is an amenable number.

47193281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47193281 is an equidigital number, since it uses as much as digits as its factorization.

47193281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 47193281 is about 6869.7366033932. The cubic root of 47193281 is about 361.3766247117.

It can be divided in two parts, 47193 and 281, that added together give a palindrome (47474).

The spelling of 47193281 in words is "forty-seven million, one hundred ninety-three thousand, two hundred eighty-one".