461522509 has 4 divisors (see below), whose sum is σ = 527454304. Its totient is φ = 395590716.

The previous prime is 461522447. The next prime is 461522533. The reversal of 461522509 is 905225164.

It is a happy number.

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 461522509 - 2¹⁹ = 460998221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461522539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32965887 + ... + 32965900.

It is an arithmetic number, because the mean of its divisors is an integer number (131863576).

Almost surely, 2^461522509 is an apocalyptic number.

It is an amenable number.

461522509 is a deficient number, since it is larger than the sum of its proper divisors (65931795).

461522509 is an equidigital number, since it uses as much as digits as its factorization.

461522509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65931794.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 461522509 is about 21483.0749428475. The cubic root of 461522509 is about 772.7949859836.

The spelling of 461522509 in words is "four hundred sixty-one million, five hundred twenty-two thousand, five hundred nine".