51220202215 has 32 divisors (see below), whose sum is σ = 76397360256. Its totient is φ = 32099673600.

The previous prime is 51220202213. The next prime is 51220202227.

51220202215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51220202215 - 2¹ = 51220202213 is a prime.

It is a super-2 number, since 2×51220202215² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220202213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 511332 + ... + 603241.

It is an arithmetic number, because the mean of its divisors is an integer number (2387417508).

Almost surely, 2^51220202215 is an apocalyptic number.

51220202215 is a deficient number, since it is larger than the sum of its proper divisors (25177158041).

51220202215 is a wasteful number, since it uses less digits than its factorization.

51220202215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114699.

The product of its (nonzero) digits is 800, while the sum is 22.

The spelling of 51220202215 in words is "fifty-one billion, two hundred twenty million, two hundred two thousand, two hundred fifteen".