1213203431 has 8 divisors (see below), whose sum is σ = 1323863184. Its totient is φ = 1102605120.

The previous prime is 1213203427. The next prime is 1213203437. The reversal of 1213203431 is 1343023121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213203431 - 2² = 1213203427 is a prime.

It is a super-2 number, since 2×1213203431² = 2943725129980343522, 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 (1213203437) 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, 32405 + ... + 58961.

It is an arithmetic number, because the mean of its divisors is an integer number (165482898).

Almost surely, 2^1213203431 is an apocalyptic number.

1213203431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213203431 is a deficient number, since it is larger than the sum of its proper divisors (110659753).

1213203431 is a wasteful number, since it uses less digits than its factorization.

1213203431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30721.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1213203431 is about 34831.0699089190. The cubic root of 1213203431 is about 1066.5417891677.

Adding to 1213203431 its reverse (1343023121), we get a palindrome (2556226552).

The spelling of 1213203431 in words is "one billion, two hundred thirteen million, two hundred three thousand, four hundred thirty-one".