1020220431 has 4 divisors (see below), whose sum is σ = 1360293912. Its totient is φ = 680146952.

The previous prime is 1020220417. The next prime is 1020220441. The reversal of 1020220431 is 1340220201.

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 1020220431 - 2⁹ = 1020219919 is a prime.

It is a super-2 number, since 2×1020220431² = 2081699455659651522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1020220431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020220441) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 170036736 + ... + 170036741.

It is an arithmetic number, because the mean of its divisors is an integer number (340073478).

Almost surely, 2^1020220431 is an apocalyptic number.

1020220431 is a deficient number, since it is larger than the sum of its proper divisors (340073481).

1020220431 is an equidigital number, since it uses as much as digits as its factorization.

1020220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340073480.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1020220431 is about 31940.8896400836. The cubic root of 1020220431 is about 1006.6952176870.

Adding to 1020220431 its reverse (1340220201), we get a palindrome (2360440632).

The spelling of 1020220431 in words is "one billion, twenty million, two hundred twenty thousand, four hundred thirty-one".