215220163340631 has 16 divisors (see below), whose sum is σ = 290186501914080. Its totient is φ = 141866989186560.

The previous prime is 215220163340569. The next prime is 215220163340657. The reversal of 215220163340631 is 136043361022512.

It is a de Polignac number, because none of the positive numbers 2^k-215220163340631 is a prime.

It is a super-2 number, since 2×215220163340631² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215220163340631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215220163340671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36836461 + ... + 42277241.

It is an arithmetic number, because the mean of its divisors is an integer number (18136656369630).

Almost surely, 2^{215220163340631} is an apocalyptic number.

215220163340631 is a deficient number, since it is larger than the sum of its proper divisors (74966338573449).

215220163340631 is a wasteful number, since it uses less digits than its factorization.

215220163340631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589026.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 215220163340631 in words is "two hundred fifteen trillion, two hundred twenty billion, one hundred sixty-three million, three hundred forty thousand, six hundred thirty-one".