1240223031 has 6 divisors (see below), whose sum is σ = 1791433280. Its totient is φ = 826815348.

The previous prime is 1240223027. The next prime is 1240223057. The reversal of 1240223031 is 1303220421.

1240223031 is a `hidden beast` number, since 1 + 2 + 402 + 230 + 31 = 666.

It is not a de Polignac number, because 1240223031 - 2² = 1240223027 is a prime.

It is a super-2 number, since 2×1240223031² = 3076306333245653922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240222995 and 1240223013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240223431) 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 5 ways as a sum of consecutive naturals, for example, 68901271 + ... + 68901288.

Almost surely, 2^1240223031 is an apocalyptic number.

1240223031 is a deficient number, since it is larger than the sum of its proper divisors (551210249).

1240223031 is a wasteful number, since it uses less digits than its factorization.

1240223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137802565 (or 137802562 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1240223031 is about 35216.8004083278. The cubic root of 1240223031 is about 1074.4014785446.

Adding to 1240223031 its reverse (1303220421), we get a palindrome (2543443452).

The spelling of 1240223031 in words is "one billion, two hundred forty million, two hundred twenty-three thousand, thirty-one".