220215617951 has 4 divisors (see below), whose sum is σ = 251674991952. Its totient is φ = 188756243952.

The previous prime is 220215617933. The next prime is 220215617969. The reversal of 220215617951 is 159716512022.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (220215617933) and next prime (220215617969).

It is a cyclic number.

It is not a de Polignac number, because 220215617951 - 2¹⁸ = 220215355807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220215617899 and 220215617908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220215667951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15729686990 + ... + 15729687003.

It is an arithmetic number, because the mean of its divisors is an integer number (62918747988).

Almost surely, 2^220215617951 is an apocalyptic number.

220215617951 is a deficient number, since it is larger than the sum of its proper divisors (31459374001).

220215617951 is an equidigital number, since it uses as much as digits as its factorization.

220215617951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31459374000.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 220215617951 in words is "two hundred twenty billion, two hundred fifteen million, six hundred seventeen thousand, nine hundred fifty-one".