1213151533 has 8 divisors (see below), whose sum is σ = 1328361120. Its totient is φ = 1098762480.

The previous prime is 1213151521. The next prime is 1213151567. The reversal of 1213151533 is 3351513121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213151533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213151498 and 1213151507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213151833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202035 + ... + 207952.

It is an arithmetic number, because the mean of its divisors is an integer number (166045140).

Almost surely, 2^1213151533 is an apocalyptic number.

It is an amenable number.

1213151533 is a deficient number, since it is larger than the sum of its proper divisors (115209587).

1213151533 is a wasteful number, since it uses less digits than its factorization.

1213151533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410267.

The product of its digits is 1350, while the sum is 25.

The square root of 1213151533 is about 34830.3249051742. The cubic root of 1213151533 is about 1066.5265808980.

Adding to 1213151533 its reverse (3351513121), we get a palindrome (4564664654).

The spelling of 1213151533 in words is "one billion, two hundred thirteen million, one hundred fifty-one thousand, five hundred thirty-three".