1217963231 has 8 divisors (see below), whose sum is σ = 1229633664. Its totient is φ = 1206345240.

The previous prime is 1217963207. The next prime is 1217963269. The reversal of 1217963231 is 1323697121.

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 1217963231 - 2¹⁸ = 1217701087 is a prime.

It is a super-2 number, since 2×1217963231² = 2966868864135918722, 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 = 1217963191 and 1217963200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217963531) 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, 34376 + ... + 60146.

It is an arithmetic number, because the mean of its divisors is an integer number (153704208).

Almost surely, 2^1217963231 is an apocalyptic number.

1217963231 is a deficient number, since it is larger than the sum of its proper divisors (11670433).

1217963231 is a wasteful number, since it uses less digits than its factorization.

1217963231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26221.

The product of its digits is 13608, while the sum is 35.

The square root of 1217963231 is about 34899.3299505879. The cubic root of 1217963231 is about 1067.9347682691.

The spelling of 1217963231 in words is "one billion, two hundred seventeen million, nine hundred sixty-three thousand, two hundred thirty-one".