1213355253 has 16 divisors (see below), whose sum is σ = 1766071296. Its totient is φ = 734870640.

The previous prime is 1213355201. The next prime is 1213355261. The reversal of 1213355253 is 3525533121.

It is not a de Polignac number, because 1213355253 - 2¹² = 1213351157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213355253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213355053) 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, 40626 + ... + 63852.

It is an arithmetic number, because the mean of its divisors is an integer number (110379456).

Almost surely, 2^1213355253 is an apocalyptic number.

It is an amenable number.

1213355253 is a deficient number, since it is larger than the sum of its proper divisors (552716043).

1213355253 is a wasteful number, since it uses less digits than its factorization.

1213355253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24824.

The product of its digits is 13500, while the sum is 30.

The square root of 1213355253 is about 34833.2492455125. The cubic root of 1213355253 is about 1066.5862768300.

Adding to 1213355253 its reverse (3525533121), we get a palindrome (4738888374).

The spelling of 1213355253 in words is "one billion, two hundred thirteen million, three hundred fifty-five thousand, two hundred fifty-three".