2157228587293 has 12 divisors (see below), whose sum is σ = 2364077711520. Its totient is φ = 1967296493136.

The previous prime is 2157228587273. The next prime is 2157228587299. The reversal of 2157228587293 is 3927858227512.

It is a happy number.

It is not a de Polignac number, because 2157228587293 - 2²¹ = 2157226490141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157228587299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76881553 + ... + 76909606.

It is an arithmetic number, because the mean of its divisors is an integer number (197006475960).

Almost surely, 2^{2157228587293} is an apocalyptic number.

It is an amenable number.

2157228587293 is a deficient number, since it is larger than the sum of its proper divisors (206849124227).

2157228587293 is a wasteful number, since it uses less digits than its factorization.

2157228587293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153791268 (or 153791255 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 61.

The spelling of 2157228587293 in words is "two trillion, one hundred fifty-seven billion, two hundred twenty-eight million, five hundred eighty-seven thousand, two hundred ninety-three".