4315981 has 2 divisors, whose sum is σ = 4315982. Its totient is φ = 4315980.

The previous prime is 4315931. The next prime is 4315991. The reversal of 4315981 is 1895134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 133956 = 2045^2 + 366^2 .

It is a cyclic number.

It is not a de Polignac number, because 4315981 - 2⁹ = 4315469 is a prime.

It is a super-2 number, since 2×4315981² = 37255383984722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4315901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2157990 + 2157991.

It is an arithmetic number, because the mean of its divisors is an integer number (2157991).

Almost surely, 2^4315981 is an apocalyptic number.

It is an amenable number.

4315981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4315981 is an equidigital number, since it uses as much as digits as its factorization.

4315981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 4315981 is about 2077.4939229755. The cubic root of 4315981 is about 162.8145355642.

The spelling of 4315981 in words is "four million, three hundred fifteen thousand, nine hundred eighty-one".