1531210013 has 2 divisors, whose sum is σ = 1531210014. Its totient is φ = 1531210012.

The previous prime is 1531210007. The next prime is 1531210049. The reversal of 1531210013 is 3100121351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1497535204 + 33674809 = 38698^2 + 5803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531210013 - 2²⁴ = 1514432797 is a prime.

It is a super-2 number, since 2×1531210013² = 4689208207822920338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1531209973 and 1531210000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531210613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765605006 + 765605007.

It is an arithmetic number, because the mean of its divisors is an integer number (765605007).

Almost surely, 2^1531210013 is an apocalyptic number.

It is an amenable number.

1531210013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531210013 is an equidigital number, since it uses as much as digits as its factorization.

1531210013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1531210013 is about 39130.6786677665. The cubic root of 1531210013 is about 1152.5990398652.

Adding to 1531210013 its reverse (3100121351), we get a palindrome (4631331364).

The spelling of 1531210013 in words is "one billion, five hundred thirty-one million, two hundred ten thousand, thirteen".