1022543231 has 4 divisors (see below), whose sum is σ = 1023387432. Its totient is φ = 1021699032.

The previous prime is 1022543227. The next prime is 1022543237. The reversal of 1022543231 is 1323452201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323452201 = 19 ⋅69655379.

It is a cyclic number.

It is not a de Polignac number, because 1022543231 - 2² = 1022543227 is a prime.

It is a super-2 number, since 2×1022543231² = 2091189318527838722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022543197 and 1022543206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022543237) 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, 420281 + ... + 422706.

It is an arithmetic number, because the mean of its divisors is an integer number (255846858).

Almost surely, 2^1022543231 is an apocalyptic number.

1022543231 is a deficient number, since it is larger than the sum of its proper divisors (844201).

1022543231 is an equidigital number, since it uses as much as digits as its factorization.

1022543231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844200.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1022543231 is about 31977.2298831528. The cubic root of 1022543231 is about 1007.4586407009.

Adding to 1022543231 its reverse (1323452201), we get a palindrome (2345995432).

The spelling of 1022543231 in words is "one billion, twenty-two million, five hundred forty-three thousand, two hundred thirty-one".