64203481 has 2 divisors, whose sum is σ = 64203482. Its totient is φ = 64203480.

The previous prime is 64203467. The next prime is 64203521. The reversal of 64203481 is 18430246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53582400 + 10621081 = 7320^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 64203481 - 2¹⁷ = 64072409 is a prime.

It is a super-2 number, since 2×64203481² = 8244173945034722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64203401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32101740 + 32101741.

It is an arithmetic number, because the mean of its divisors is an integer number (32101741).

Almost surely, 2^64203481 is an apocalyptic number.

It is an amenable number.

64203481 is a deficient number, since it is larger than the sum of its proper divisors (1).

64203481 is an equidigital number, since it uses as much as digits as its factorization.

64203481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 64203481 is about 8012.7074700129. The cubic root of 64203481 is about 400.4234702741.

The spelling of 64203481 in words is "sixty-four million, two hundred three thousand, four hundred eighty-one".