2156251322236 has 48 divisors (see below), whose sum is σ = 4227174604800. Its totient is φ = 954049561920.

The previous prime is 2156251322221. The next prime is 2156251322249. The reversal of 2156251322236 is 6322231526512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3344136 + ... + 3936463.

It is an arithmetic number, because the mean of its divisors is an integer number (88066137600).

Almost surely, 2^{2156251322236} is an apocalyptic number.

It is an amenable number.

2156251322236 is a deficient number, since it is larger than the sum of its proper divisors (2070923282564).

2156251322236 is a wasteful number, since it uses less digits than its factorization.

2156251322236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7280794 (or 7280792 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

Adding to 2156251322236 its reverse (6322231526512), we get a palindrome (8478482848748).

The spelling of 2156251322236 in words is "two trillion, one hundred fifty-six billion, two hundred fifty-one million, three hundred twenty-two thousand, two hundred thirty-six".