1213500253 has 16 divisors (see below), whose sum is σ = 1399910400. Its totient is φ = 1030392576.

The previous prime is 1213500241. The next prime is 1213500271. The reversal of 1213500253 is 3520053121.

It is a cyclic number.

It is not a de Polignac number, because 1213500253 - 2⁵ = 1213500221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213540253) 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, 450276 + ... + 452962.

It is an arithmetic number, because the mean of its divisors is an integer number (87494400).

Almost surely, 2^1213500253 is an apocalyptic number.

It is an amenable number.

1213500253 is a deficient number, since it is larger than the sum of its proper divisors (186410147).

1213500253 is a wasteful number, since it uses less digits than its factorization.

1213500253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1213500253 is about 34835.3305280716. The cubic root of 1213500253 is about 1066.6287620103.

Adding to 1213500253 its reverse (3520053121), we get a palindrome (4733553374).

The spelling of 1213500253 in words is "one billion, two hundred thirteen million, five hundred thousand, two hundred fifty-three".