1021431322 has 4 divisors (see below), whose sum is σ = 1532146986. Its totient is φ = 510715660.

The previous prime is 1021431277. The next prime is 1021431343. The reversal of 1021431322 is 2231341201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2231341201 = 2741 ⋅814061.

It can be written as a sum of positive squares in only one way, i.e., 998496801 + 22934521 = 31599^2 + 4789^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021431322.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255357829 + ... + 255357832.

Almost surely, 2^1021431322 is an apocalyptic number.

1021431322 is a deficient number, since it is larger than the sum of its proper divisors (510715664).

1021431322 is an equidigital number, since it uses as much as digits as its factorization.

1021431322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510715663.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1021431322 is about 31959.8392048521. The cubic root of 1021431322 is about 1007.0933395656.

Adding to 1021431322 its reverse (2231341201), we get a palindrome (3252772523).

The spelling of 1021431322 in words is "one billion, twenty-one million, four hundred thirty-one thousand, three hundred twenty-two".