15212203247 has 2 divisors, whose sum is σ = 15212203248. Its totient is φ = 15212203246.

The previous prime is 15212203217. The next prime is 15212203261. The reversal of 15212203247 is 74230221251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15212203247 - 2⁶ = 15212203183 is a prime.

It is a super-2 number, since 2×15212203247² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15212203217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606101623 + 7606101624.

It is an arithmetic number, because the mean of its divisors is an integer number (7606101624).

Almost surely, 2^15212203247 is an apocalyptic number.

15212203247 is a deficient number, since it is larger than the sum of its proper divisors (1).

15212203247 is an equidigital number, since it uses as much as digits as its factorization.

15212203247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 15212203247 its reverse (74230221251), we get a palindrome (89442424498).

The spelling of 15212203247 in words is "fifteen billion, two hundred twelve million, two hundred three thousand, two hundred forty-seven".