1215062251989 has 32 divisors (see below), whose sum is σ = 1730604994560. Its totient is φ = 755638152192.

The previous prime is 1215062251969. The next prime is 1215062251999. The reversal of 1215062251989 is 9891522605121.

It is not a de Polignac number, because 1215062251989 - 2¹¹ = 1215062249941 is a prime.

It is a super-2 number, since 2×1215062251989² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215062251969) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 6468607 + ... + 6653795.

It is an arithmetic number, because the mean of its divisors is an integer number (54081406080).

Almost surely, 2^{1215062251989} is an apocalyptic number.

It is an amenable number.

1215062251989 is a deficient number, since it is larger than the sum of its proper divisors (515542742571).

1215062251989 is a wasteful number, since it uses less digits than its factorization.

1215062251989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186349.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 1215062251989 in words is "one trillion, two hundred fifteen billion, sixty-two million, two hundred fifty-one thousand, nine hundred eighty-nine".