1212536531 has 2 divisors, whose sum is σ = 1212536532. Its totient is φ = 1212536530.

The previous prime is 1212536527. The next prime is 1212536539. The reversal of 1212536531 is 1356352121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212536531 - 2² = 1212536527 is a prime.

It is a super-2 number, since 2×1212536531² = 2940489678019027922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212536494 and 1212536503.

It is not a weakly prime, because it can be changed into another prime (1212536539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606268265 + 606268266.

It is an arithmetic number, because the mean of its divisors is an integer number (606268266).

Almost surely, 2^1212536531 is an apocalyptic number.

1212536531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212536531 is an equidigital number, since it uses as much as digits as its factorization.

1212536531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 1212536531 is about 34821.4952435992. The cubic root of 1212536531 is about 1066.3463267331.

Adding to 1212536531 its reverse (1356352121), we get a palindrome (2568888652).

The spelling of 1212536531 in words is "one billion, two hundred twelve million, five hundred thirty-six thousand, five hundred thirty-one".