20122215 has 8 divisors (see below), whose sum is σ = 32195568. Its totient is φ = 10731840.

The previous prime is 20122213. The next prime is 20122241. The reversal of 20122215 is 51222102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20122215 - 2¹ = 20122213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1341481 = 20122215 / (2 + 0 + 1 + 2 + 2 + 2 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 20122194 and 20122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670726 + ... + 670755.

It is an arithmetic number, because the mean of its divisors is an integer number (4024446).

Almost surely, 2^20122215 is an apocalyptic number.

20122215 is a deficient number, since it is larger than the sum of its proper divisors (12073353).

20122215 is a wasteful number, since it uses less digits than its factorization.

20122215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341489.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20122215 is about 4485.7791965276. The cubic root of 20122215 is about 271.9935434958.

Adding to 20122215 its reverse (51222102), we get a palindrome (71344317).

The spelling of 20122215 in words is "twenty million, one hundred twenty-two thousand, two hundred fifteen".