1145520322 has 4 divisors (see below), whose sum is σ = 1718280486. Its totient is φ = 572760160.

The previous prime is 1145520283. The next prime is 1145520347. The reversal of 1145520322 is 2230255411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2230255411 = 29 ⋅76905359.

It can be written as a sum of positive squares in only one way, i.e., 826505001 + 319015321 = 28749^2 + 17861^2 .

It is a super-2 number, since 2×1145520322² = 2624433616229967368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286380079 + ... + 286380082.

Almost surely, 2^1145520322 is an apocalyptic number.

1145520322 is a deficient number, since it is larger than the sum of its proper divisors (572760164).

1145520322 is an equidigital number, since it uses as much as digits as its factorization.

1145520322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572760163.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1145520322 is about 33845.5362197144. The cubic root of 1145520322 is about 1046.3274026992.

Adding to 1145520322 its reverse (2230255411), we get a palindrome (3375775733).

The spelling of 1145520322 in words is "one billion, one hundred forty-five million, five hundred twenty thousand, three hundred twenty-two".