220321431 has 32 divisors (see below), whose sum is σ = 357177600. Its totient is φ = 133115040.

The previous prime is 220321427. The next prime is 220321459. The reversal of 220321431 is 134123022.

It is not a de Polignac number, because 220321431 - 2² = 220321427 is a prime.

It is a super-2 number, since 2×220321431² = 97083065915775522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220321631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114580 + ... + 116486.

It is an arithmetic number, because the mean of its divisors is an integer number (11161800).

Almost surely, 2^220321431 is an apocalyptic number.

220321431 is a deficient number, since it is larger than the sum of its proper divisors (136856169).

220321431 is a wasteful number, since it uses less digits than its factorization.

220321431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316 (or 2310 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 220321431 is about 14843.2284561008. The cubic root of 220321431 is about 603.9749333559.

Adding to 220321431 its reverse (134123022), we get a palindrome (354444453).

The spelling of 220321431 in words is "two hundred twenty million, three hundred twenty-one thousand, four hundred thirty-one".