462217981 has 4 divisors (see below), whose sum is σ = 489407292. Its totient is φ = 435028672.

The previous prime is 462217963. The next prime is 462217991. The reversal of 462217981 is 189712264.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 429898756 + 32319225 = 20734^2 + 5685^2 .

It is a cyclic number.

It is not a de Polignac number, because 462217981 - 2¹⁷ = 462086909 is a prime.

It is a super-2 number, since 2×462217981² = 427290923919432722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (462217961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13594630 + ... + 13594663.

It is an arithmetic number, because the mean of its divisors is an integer number (122351823).

Almost surely, 2^462217981 is an apocalyptic number.

It is an amenable number.

462217981 is a deficient number, since it is larger than the sum of its proper divisors (27189311).

462217981 is a wasteful number, since it uses less digits than its factorization.

462217981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27189310.

The product of its digits is 48384, while the sum is 40.

The square root of 462217981 is about 21499.2553591979. The cubic root of 462217981 is about 773.1829681683.

The spelling of 462217981 in words is "four hundred sixty-two million, two hundred seventeen thousand, nine hundred eighty-one".