1040020531 has 12 divisors (see below), whose sum is σ = 1174064416. Its totient is φ = 919915920.

The previous prime is 1040020529. The next prime is 1040020547. The reversal of 1040020531 is 1350200401.

It is not a de Polignac number, because 1040020531 - 2¹ = 1040020529 is a prime.

It is a super-2 number, since 2×1040020531² = 2163285409803043922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040029531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111675 + ... + 120628.

Almost surely, 2^1040020531 is an apocalyptic number.

1040020531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1040020531 is a deficient number, since it is larger than the sum of its proper divisors (134043885).

1040020531 is a wasteful number, since it uses less digits than its factorization.

1040020531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232362 (or 232351 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1040020531 is about 32249.3493112652. The cubic root of 1040020531 is about 1013.1660708198.

Adding to 1040020531 its reverse (1350200401), we get a palindrome (2390220932).

The spelling of 1040020531 in words is "one billion, forty million, twenty thousand, five hundred thirty-one".