63351491 has 16 divisors (see below), whose sum is σ = 76569600. Its totient is φ = 51202368.

The previous prime is 63351487. The next prime is 63351523. The reversal of 63351491 is 19415336.

It is not a de Polignac number, because 63351491 - 2² = 63351487 is a prime.

It is a super-2 number, since 2×63351491² = 8026822823846162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63351481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30791 + ... + 32783.

It is an arithmetic number, because the mean of its divisors is an integer number (4785600).

Almost surely, 2^63351491 is an apocalyptic number.

63351491 is a deficient number, since it is larger than the sum of its proper divisors (13218109).

63351491 is a wasteful number, since it uses less digits than its factorization.

63351491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258.

The product of its digits is 9720, while the sum is 32.

The square root of 63351491 is about 7959.3649872336. The cubic root of 63351491 is about 398.6443503085.

The spelling of 63351491 in words is "sixty-three million, three hundred fifty-one thousand, four hundred ninety-one".