1030431981 has 8 divisors (see below), whose sum is σ = 1411042144. Its totient is φ = 668388240.

The previous prime is 1030431979. The next prime is 1030432001. The reversal of 1030431981 is 1891340301.

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

It is not a de Polignac number, because 1030431981 - 2¹ = 1030431979 is a prime.

It is a super-2 number, since 2×1030431981² = 2123580134935168722, 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 (1030431911) 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, 4641475 + ... + 4641696.

It is an arithmetic number, because the mean of its divisors is an integer number (176380268).

Almost surely, 2^1030431981 is an apocalyptic number.

It is an amenable number.

1030431981 is a deficient number, since it is larger than the sum of its proper divisors (380610163).

1030431981 is an equidigital number, since it uses as much as digits as its factorization.

1030431981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9283211.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1030431981 is about 32100.3423813516. The cubic root of 1030431981 is about 1010.0427982387.

The spelling of 1030431981 in words is "one billion, thirty million, four hundred thirty-one thousand, nine hundred eighty-one".