1215071051 has 2 divisors, whose sum is σ = 1215071052. Its totient is φ = 1215071050.

The previous prime is 1215070991. The next prime is 1215071059. The reversal of 1215071051 is 1501705121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215071051 - 2¹⁴ = 1215054667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215071059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607535525 + 607535526.

It is an arithmetic number, because the mean of its divisors is an integer number (607535526).

Almost surely, 2^1215071051 is an apocalyptic number.

1215071051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215071051 is an equidigital number, since it uses as much as digits as its factorization.

1215071051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 1215071051 is about 34857.8692837069. The cubic root of 1215071051 is about 1067.0887910096.

Adding to 1215071051 its reverse (1501705121), we get a palindrome (2716776172).

The spelling of 1215071051 in words is "one billion, two hundred fifteen million, seventy-one thousand, fifty-one".