1056537213 has 4 divisors (see below), whose sum is σ = 1408716288. Its totient is φ = 704358140.

The previous prime is 1056537211. The next prime is 1056537217. The reversal of 1056537213 is 3127356501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3127356501 = 3 ⋅1042452167.

It is a cyclic number.

It is not a de Polignac number, because 1056537213 - 2¹ = 1056537211 is a prime.

It is a super-2 number, since 2×1056537213² = 2232541764907614738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056537211) 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, 176089533 + ... + 176089538.

It is an arithmetic number, because the mean of its divisors is an integer number (352179072).

Almost surely, 2^1056537213 is an apocalyptic number.

It is an amenable number.

1056537213 is a deficient number, since it is larger than the sum of its proper divisors (352179075).

1056537213 is an equidigital number, since it uses as much as digits as its factorization.

1056537213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352179074.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 1056537213 is about 32504.4183612013. The cubic root of 1056537213 is about 1018.5013275495.

The spelling of 1056537213 in words is "one billion, fifty-six million, five hundred thirty-seven thousand, two hundred thirteen".