1061643331 has 8 divisors (see below), whose sum is σ = 1246099040. Its totient is φ = 885385728.

The previous prime is 1061643301. The next prime is 1061643347. The reversal of 1061643331 is 1333461601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1061643331 - 2²³ = 1053254723 is a prime.

It is a super-2 number, since 2×1061643331² = 2254173124513551122, which contains 22 as substring.

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 1061643331.

It is not an unprimeable number, because it can be changed into a prime (1061643301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2049246 + ... + 2049763.

It is an arithmetic number, because the mean of its divisors is an integer number (155762380).

Almost surely, 2^1061643331 is an apocalyptic number.

1061643331 is a deficient number, since it is larger than the sum of its proper divisors (184455709).

1061643331 is an equidigital number, since it uses as much as digits as its factorization.

1061643331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099053.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1061643331 is about 32582.8686735837. The cubic root of 1061643331 is about 1020.1394564546.

The spelling of 1061643331 in words is "one billion, sixty-one million, six hundred forty-three thousand, three hundred thirty-one".