1213041533 has 4 divisors (see below), whose sum is σ = 1323318048. Its totient is φ = 1102765020.

The previous prime is 1213041527. The next prime is 1213041587. The reversal of 1213041533 is 3351403121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3351403121 = 11 ⋅304673011.

It is a cyclic number.

It is not a de Polignac number, because 1213041533 - 2⁶ = 1213041469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213041499 and 1213041508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213041433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55138241 + ... + 55138262.

It is an arithmetic number, because the mean of its divisors is an integer number (330829512).

Almost surely, 2^1213041533 is an apocalyptic number.

It is an amenable number.

1213041533 is a deficient number, since it is larger than the sum of its proper divisors (110276515).

1213041533 is a wasteful number, since it uses less digits than its factorization.

1213041533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110276514.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1213041533 is about 34828.7457856294. The cubic root of 1213041533 is about 1066.4943448948.

Adding to 1213041533 its reverse (3351403121), we get a palindrome (4564444654).

The spelling of 1213041533 in words is "one billion, two hundred thirteen million, forty-one thousand, five hundred thirty-three".