63901281 has 8 divisors (see below), whose sum is σ = 85256224. Its totient is φ = 42573600.

The previous prime is 63901273. The next prime is 63901289. The reversal of 63901281 is 18210936.

It is an interprime number because it is at equal distance from previous prime (63901273) and next prime (63901289).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63901281 - 2³ = 63901273 is a prime.

It is a super-2 number, since 2×63901281² = 8166747426881922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63901289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (10657028).

Almost surely, 2^63901281 is an apocalyptic number.

It is an amenable number.

63901281 is a deficient number, since it is larger than the sum of its proper divisors (21354943).

63901281 is a wasteful number, since it uses less digits than its factorization.

63901281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13631.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 63901281 is about 7993.8276814052. The cubic root of 63901281 is about 399.7942295812.

The spelling of 63901281 in words is "sixty-three million, nine hundred one thousand, two hundred eighty-one".