1215630133 has 2 divisors, whose sum is σ = 1215630134. Its totient is φ = 1215630132.

The previous prime is 1215630131. The next prime is 1215630139. The reversal of 1215630133 is 3310365121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055405169 + 160224964 = 32487^2 + 12658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215630133 - 2¹ = 1215630131 is a prime.

Together with 1215630131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1215630098 and 1215630107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215630131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607815066 + 607815067.

It is an arithmetic number, because the mean of its divisors is an integer number (607815067).

Almost surely, 2^1215630133 is an apocalyptic number.

It is an amenable number.

1215630133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215630133 is an equidigital number, since it uses as much as digits as its factorization.

1215630133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1215630133 is about 34865.8878131620. The cubic root of 1215630133 is about 1067.2524299059.

Adding to 1215630133 its reverse (3310365121), we get a palindrome (4525995254).

The spelling of 1215630133 in words is "one billion, two hundred fifteen million, six hundred thirty thousand, one hundred thirty-three".