1056531943 has 4 divisors (see below), whose sum is σ = 1059167088. Its totient is φ = 1053896800.

The previous prime is 1056531937. The next prime is 1056531961. The reversal of 1056531943 is 3491356501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1056531943 - 2⁹ = 1056531431 is a prime.

It is a super-2 number, since 2×1056531943² = 2232519493158710498, 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 (1056531913) 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, 1316971 + ... + 1317772.

It is an arithmetic number, because the mean of its divisors is an integer number (264791772).

Almost surely, 2^1056531943 is an apocalyptic number.

1056531943 is a deficient number, since it is larger than the sum of its proper divisors (2635145).

1056531943 is an equidigital number, since it uses as much as digits as its factorization.

1056531943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635144.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 1056531943 is about 32504.3372951980. The cubic root of 1056531943 is about 1018.4996341209.

The spelling of 1056531943 in words is "one billion, fifty-six million, five hundred thirty-one thousand, nine hundred forty-three".