1020343131 has 12 divisors (see below), whose sum is σ = 1474110352. Its totient is φ = 680098896.

The previous prime is 1020343127. The next prime is 1020343133. The reversal of 1020343131 is 1313430201.

1020343131 is a `hidden beast` number, since 1 + 0 + 203 + 431 + 31 = 666.

It is not a de Polignac number, because 1020343131 - 2² = 1020343127 is a prime.

It is a super-2 number, since 2×1020343131² = 2082200209957766322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020343133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73605 + ... + 86361.

Almost surely, 2^1020343131 is an apocalyptic number.

1020343131 is a deficient number, since it is larger than the sum of its proper divisors (453767221).

1020343131 is a wasteful number, since it uses less digits than its factorization.

1020343131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21650 (or 21647 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1020343131 is about 31942.8103178164. The cubic root of 1020343131 is about 1006.7355738518.

Adding to 1020343131 its reverse (1313430201), we get a palindrome (2333773332).

The spelling of 1020343131 in words is "one billion, twenty million, three hundred forty-three thousand, one hundred thirty-one".