461547881 has 4 divisors (see below), whose sum is σ = 466117764. Its totient is φ = 456978000.

The previous prime is 461547869. The next prime is 461547883. The reversal of 461547881 is 188745164.

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 226201600 + 235346281 = 15040^2 + 15341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-461547881 is a prime.

It is a super-2 number, since 2×461547881² = 426052892911180322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461547883) 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, 2284790 + ... + 2284991.

It is an arithmetic number, because the mean of its divisors is an integer number (116529441).

Almost surely, 2^461547881 is an apocalyptic number.

It is an amenable number.

461547881 is a deficient number, since it is larger than the sum of its proper divisors (4569883).

461547881 is a wasteful number, since it uses less digits than its factorization.

461547881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569882.

The product of its digits is 215040, while the sum is 44.

The square root of 461547881 is about 21483.6654461011. The cubic root of 461547881 is about 772.8091470806.

The spelling of 461547881 in words is "four hundred sixty-one million, five hundred forty-seven thousand, eight hundred eighty-one".