15212202989 has 2 divisors, whose sum is σ = 15212202990. Its totient is φ = 15212202988.

The previous prime is 15212202961. The next prime is 15212203001. The reversal of 15212202989 is 98920221251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14998166089 + 214036900 = 122467^2 + 14630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15212202989 is a prime.

It is a super-2 number, since 2×15212202989² (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 (15212204989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606101494 + 7606101495.

It is an arithmetic number, because the mean of its divisors is an integer number (7606101495).

Almost surely, 2^15212202989 is an apocalyptic number.

It is an amenable number.

15212202989 is a deficient number, since it is larger than the sum of its proper divisors (1).

15212202989 is an equidigital number, since it uses as much as digits as its factorization.

15212202989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 15212202989 in words is "fifteen billion, two hundred twelve million, two hundred two thousand, nine hundred eighty-nine".