461920181 has 4 divisors (see below), whose sum is σ = 476820864. Its totient is φ = 447019500.

The previous prime is 461920169. The next prime is 461920211. The reversal of 461920181 is 181029164.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 461920181 - 2⁶ = 461920117 is a prime.

It is a super-2 number, since 2×461920181² = 426740507230145522, 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 (461923181) 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, 7450295 + ... + 7450356.

It is an arithmetic number, because the mean of its divisors is an integer number (119205216).

Almost surely, 2^461920181 is an apocalyptic number.

It is an amenable number.

461920181 is a deficient number, since it is larger than the sum of its proper divisors (14900683).

461920181 is a wasteful number, since it uses less digits than its factorization.

461920181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14900682.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 461920181 is about 21492.3284220207. The cubic root of 461920181 is about 773.0168824939.

The spelling of 461920181 in words is "four hundred sixty-one million, nine hundred twenty thousand, one hundred eighty-one".