1023332561 has 4 divisors (see below), whose sum is σ = 1083528612. Its totient is φ = 963136512.

The previous prime is 1023332549. The next prime is 1023332573. The reversal of 1023332561 is 1652333201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652333201 = 31 ⋅53301071.

It is an interprime number because it is at equal distance from previous prime (1023332549) and next prime (1023332573).

It can be written as a sum of positive squares in 2 ways, for example, as 480442561 + 542890000 = 21919^2 + 23300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023332561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023332561.

It is not an unprimeable number, because it can be changed into a prime (1023332581) 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, 30098000 + ... + 30098033.

It is an arithmetic number, because the mean of its divisors is an integer number (270882153).

Almost surely, 2^1023332561 is an apocalyptic number.

It is an amenable number.

1023332561 is a deficient number, since it is larger than the sum of its proper divisors (60196051).

1023332561 is an equidigital number, since it uses as much as digits as its factorization.

1023332561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60196050.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1023332561 is about 31989.5695657194. The cubic root of 1023332561 is about 1007.7178026204.

Adding to 1023332561 its reverse (1652333201), we get a palindrome (2675665762).

The spelling of 1023332561 in words is "one billion, twenty-three million, three hundred thirty-two thousand, five hundred sixty-one".