1061431311 has 8 divisors (see below), whose sum is σ = 1415396224. Its totient is φ = 707543640.

The previous prime is 1061431309. The next prime is 1061431337. The reversal of 1061431311 is 1131341601.

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

It is not a de Polignac number, because 1061431311 - 2¹ = 1061431309 is a prime.

It is a super-2 number, since 2×1061431311² = 2253272855942357442, 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 (1061433311) 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, 33006 + ... + 56676.

It is an arithmetic number, because the mean of its divisors is an integer number (176924528).

Almost surely, 2^1061431311 is an apocalyptic number.

1061431311 is a deficient number, since it is larger than the sum of its proper divisors (353964913).

1061431311 is a wasteful number, since it uses less digits than its factorization.

1061431311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38621.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1061431311 is about 32579.6149608923. The cubic root of 1061431311 is about 1020.0715415026.

Adding to 1061431311 its reverse (1131341601), we get a palindrome (2192772912).

The spelling of 1061431311 in words is "one billion, sixty-one million, four hundred thirty-one thousand, three hundred eleven".