1220047431 has 4 divisors (see below), whose sum is σ = 1626729912. Its totient is φ = 813364952.

The previous prime is 1220047417. The next prime is 1220047441. The reversal of 1220047431 is 1347400221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220047431 - 2⁷ = 1220047303 is a prime.

It is a super-2 number, since 2×1220047431² = 2977031467779399522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220047441) 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, 203341236 + ... + 203341241.

It is an arithmetic number, because the mean of its divisors is an integer number (406682478).

Almost surely, 2^1220047431 is an apocalyptic number.

1220047431 is a deficient number, since it is larger than the sum of its proper divisors (406682481).

1220047431 is an equidigital number, since it uses as much as digits as its factorization.

1220047431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406682480.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1220047431 is about 34929.1773593367. The cubic root of 1220047431 is about 1068.5435773557.

Adding to 1220047431 its reverse (1347400221), we get a palindrome (2567447652).

The spelling of 1220047431 in words is "one billion, two hundred twenty million, forty-seven thousand, four hundred thirty-one".