15212203245 has 32 divisors (see below), whose sum is σ = 28634739840. Its totient is φ = 7635928320.

The previous prime is 15212203217. The next prime is 15212203247. The reversal of 15212203245 is 54230221251.

15212203245 is a `hidden beast` number, since 1 + 5 + 212 + 203 + 245 = 666.

It is not a de Polignac number, because 15212203245 - 2⁸ = 15212202989 is a prime.

It is a super-2 number, since 2×15212203245² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15212203247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3311911 + ... + 3316500.

It is an arithmetic number, because the mean of its divisors is an integer number (894835620).

Almost surely, 2^15212203245 is an apocalyptic number.

15212203245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15212203245 is a deficient number, since it is larger than the sum of its proper divisors (13422536595).

15212203245 is a wasteful number, since it uses less digits than its factorization.

15212203245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628442 (or 6628436 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 15212203245 its reverse (54230221251), we get a palindrome (69442424496).

The spelling of 15212203245 in words is "fifteen billion, two hundred twelve million, two hundred three thousand, two hundred forty-five".