461131220 has 24 divisors (see below), whose sum is σ = 1056410208. Its totient is φ = 167684000.

The previous prime is 461131201. The next prime is 461131243. The reversal of 461131220 is 22131164.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 461131192 and 461131201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047806 + ... + 1048245.

It is an arithmetic number, because the mean of its divisors is an integer number (44017092).

Almost surely, 2^461131220 is an apocalyptic number.

It is an amenable number.

461131220 is an abundant number, since it is smaller than the sum of its proper divisors (595278988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

461131220 is a wasteful number, since it uses less digits than its factorization.

461131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096071 (or 2096069 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 461131220 is about 21473.9660985110. The cubic root of 461131220 is about 772.5765266681.

Adding to 461131220 its reverse (22131164), we get a palindrome (483262384).

The spelling of 461131220 in words is "four hundred sixty-one million, one hundred thirty-one thousand, two hundred twenty".