23515061612212 has 6 divisors (see below), whose sum is σ = 41151357821378. Its totient is φ = 11757530806104.

The previous prime is 23515061612179. The next prime is 23515061612257. The reversal of 23515061612212 is 21221616051532.

It can be written as a sum of positive squares in only one way, i.e., 17814781211536 + 5700280400676 = 4220756^2 + 2387526^2 .

It is a super-2 number, since 2×23515061612212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2939382701523 + ... + 2939382701530.

Almost surely, 2^{23515061612212} is an apocalyptic number.

It is an amenable number.

23515061612212 is a deficient number, since it is larger than the sum of its proper divisors (17636296209166).

23515061612212 is a wasteful number, since it uses less digits than its factorization.

23515061612212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5878765403057 (or 5878765403055 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 23515061612212 its reverse (21221616051532), we get a palindrome (44736677663744).

The spelling of 23515061612212 in words is "twenty-three trillion, five hundred fifteen billion, sixty-one million, six hundred twelve thousand, two hundred twelve".