63257481 has 36 divisors (see below), whose sum is σ = 106988544. Its totient is φ = 35910000.

The previous prime is 63257477. The next prime is 63257533. The reversal of 63257481 is 18475236.

63257481 is a `hidden beast` number, since 6 + 3 + 2 + 574 + 81 = 666.

It is not a de Polignac number, because 63257481 - 2² = 63257477 is a prime.

It is a super-2 number, since 2×63257481² = 8003017804930722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63257401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 83856 + ... + 84606.

It is an arithmetic number, because the mean of its divisors is an integer number (2971904).

Almost surely, 2^63257481 is an apocalyptic number.

It is an amenable number.

63257481 is a deficient number, since it is larger than the sum of its proper divisors (43731063).

63257481 is a wasteful number, since it uses less digits than its factorization.

63257481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 952 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 63257481 is about 7953.4571728274. The cubic root of 63257481 is about 398.4470641949.

The spelling of 63257481 in words is "sixty-three million, two hundred fifty-seven thousand, four hundred eighty-one".