10320531261 has 4 divisors (see below), whose sum is σ = 13760708352. Its totient is φ = 6880354172.

The previous prime is 10320531259. The next prime is 10320531269. The reversal of 10320531261 is 16213502301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10320531261 - 2¹ = 10320531259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10320531269) 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, 1720088541 + ... + 1720088546.

It is an arithmetic number, because the mean of its divisors is an integer number (3440177088).

Almost surely, 2^10320531261 is an apocalyptic number.

It is an amenable number.

10320531261 is a deficient number, since it is larger than the sum of its proper divisors (3440177091).

10320531261 is an equidigital number, since it uses as much as digits as its factorization.

10320531261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440177090.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 10320531261 in words is "ten billion, three hundred twenty million, five hundred thirty-one thousand, two hundred sixty-one".