63451481 has 2 divisors, whose sum is σ = 63451482. Its totient is φ = 63451480.

The previous prime is 63451459. The next prime is 63451489. The reversal of 63451481 is 18415436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 10758400 = 7259^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 63451481 - 2⁶ = 63451417 is a prime.

It is a super-2 number, since 2×63451481² = 8052180882186722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63451489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31725740 + 31725741.

It is an arithmetic number, because the mean of its divisors is an integer number (31725741).

Almost surely, 2^63451481 is an apocalyptic number.

It is an amenable number.

63451481 is a deficient number, since it is larger than the sum of its proper divisors (1).

63451481 is an equidigital number, since it uses as much as digits as its factorization.

63451481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 63451481 is about 7965.6437906801. The cubic root of 63451481 is about 398.8539717673.

The spelling of 63451481 in words is "sixty-three million, four hundred fifty-one thousand, four hundred eighty-one".