47152981 has 2 divisors, whose sum is σ = 47152982. Its totient is φ = 47152980.

The previous prime is 47152969. The next prime is 47152999. The reversal of 47152981 is 18925174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47141956 + 11025 = 6866^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 47152981 - 2¹¹ = 47150933 is a prime.

It is a super-2 number, since 2×47152981² = 4446807234372722, 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 47152981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47152901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23576490 + 23576491.

It is an arithmetic number, because the mean of its divisors is an integer number (23576491).

Almost surely, 2^47152981 is an apocalyptic number.

It is an amenable number.

47152981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47152981 is an equidigital number, since it uses as much as digits as its factorization.

47152981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 47152981 is about 6866.8028222747. The cubic root of 47152981 is about 361.2737313545.

The spelling of 47152981 in words is "forty-seven million, one hundred fifty-two thousand, nine hundred eighty-one".