412531221 has 4 divisors (see below), whose sum is σ = 550041632. Its totient is φ = 275020812.

The previous prime is 412531213. The next prime is 412531279. The reversal of 412531221 is 122135214.

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 not a de Polignac number, because 412531221 - 2³ = 412531213 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 (412531201) 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, 68755201 + ... + 68755206.

It is an arithmetic number, because the mean of its divisors is an integer number (137510408).

Almost surely, 2^412531221 is an apocalyptic number.

It is an amenable number.

412531221 is a deficient number, since it is larger than the sum of its proper divisors (137510411).

412531221 is a wasteful number, since it uses less digits than its factorization.

412531221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137510410.

The product of its digits is 480, while the sum is 21.

The square root of 412531221 is about 20310.8646049350. The cubic root of 412531221 is about 744.4215566084.

Adding to 412531221 its reverse (122135214), we get a palindrome (534666435).

The spelling of 412531221 in words is "four hundred twelve million, five hundred thirty-one thousand, two hundred twenty-one".