1056531013 has 4 divisors (see below), whose sum is σ = 1102467168. Its totient is φ = 1010594860.

The previous prime is 1056530957. The next prime is 1056531017. The reversal of 1056531013 is 3101356501.

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 1056531013 - 2¹³ = 1056522821 is a prime.

It is a super-2 number, since 2×1056531013² = 2232515562861612338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056531017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22968043 + ... + 22968088.

It is an arithmetic number, because the mean of its divisors is an integer number (275616792).

Almost surely, 2^1056531013 is an apocalyptic number.

It is an amenable number.

1056531013 is a deficient number, since it is larger than the sum of its proper divisors (45936155).

1056531013 is an equidigital number, since it uses as much as digits as its factorization.

1056531013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45936154.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 1056531013 is about 32504.3229894117. The cubic root of 1056531013 is about 1018.4993352800.

Adding to 1056531013 its reverse (3101356501), we get a palindrome (4157887514).

The spelling of 1056531013 in words is "one billion, fifty-six million, five hundred thirty-one thousand, thirteen".