1213136253 has 24 divisors (see below), whose sum is σ = 2049215168. Its totient is φ = 677097792.

The previous prime is 1213136251. The next prime is 1213136293. The reversal of 1213136253 is 3526313121.

1213136253 is a `hidden beast` number, since 1 + 2 + 1 + 31 + 3 + 625 + 3 = 666.

It is not a de Polignac number, because 1213136253 - 2¹ = 1213136251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213136251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221200 + ... + 226617.

Almost surely, 2^1213136253 is an apocalyptic number.

It is an amenable number.

1213136253 is a deficient number, since it is larger than the sum of its proper divisors (836078915).

1213136253 is a wasteful number, since it uses less digits than its factorization.

1213136253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447873 (or 447870 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 1213136253 is about 34830.1055553956. The cubic root of 1213136253 is about 1066.5221031406.

Adding to 1213136253 its reverse (3526313121), we get a palindrome (4739449374).

It can be divided in two parts, 12131 and 36253, that added together give a palindrome (48384).

The spelling of 1213136253 in words is "one billion, two hundred thirteen million, one hundred thirty-six thousand, two hundred fifty-three".