1213031310 has 32 divisors (see below), whose sum is σ = 2989960992. Its totient is φ = 314732160.

The previous prime is 1213031297. The next prime is 1213031317. The reversal of 1213031310 is 131303121.

It is a super-2 number, since 2×1213031310² = 2942889918080632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213031310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213031317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545301 + ... + 547520.

It is an arithmetic number, because the mean of its divisors is an integer number (93436281).

Almost surely, 2^1213031310 is an apocalyptic number.

1213031310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213031310 is an abundant number, since it is smaller than the sum of its proper divisors (1776929682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213031310 is a wasteful number, since it uses less digits than its factorization.

1213031310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092868.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1213031310 is about 34828.5990243650. The cubic root of 1213031310 is about 1066.4913488990.

Adding to 1213031310 its reverse (131303121), we get a palindrome (1344334431).

The spelling of 1213031310 in words is "one billion, two hundred thirteen million, thirty-one thousand, three hundred ten".