1220403431 has 16 divisors (see below), whose sum is σ = 1329968640. Its totient is φ = 1113130080.

The previous prime is 1220403427. The next prime is 1220403479. The reversal of 1220403431 is 1343040221.

It is a cyclic number.

It is not a de Polignac number, because 1220403431 - 2² = 1220403427 is a prime.

It is a super-2 number, since 2×1220403431² = 2978769068793143522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220403631) 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 15 ways as a sum of consecutive naturals, for example, 924590 + ... + 925908.

It is an arithmetic number, because the mean of its divisors is an integer number (83123040).

Almost surely, 2^1220403431 is an apocalyptic number.

1220403431 is a deficient number, since it is larger than the sum of its proper divisors (109565209).

1220403431 is a wasteful number, since it uses less digits than its factorization.

1220403431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1220403431 is about 34934.2730137611. The cubic root of 1220403431 is about 1068.6474980477.

Adding to 1220403431 its reverse (1343040221), we get a palindrome (2563443652).

The spelling of 1220403431 in words is "one billion, two hundred twenty million, four hundred three thousand, four hundred thirty-one".