51022197 has 16 divisors (see below), whose sum is σ = 76872000. Its totient is φ = 33437232.

The previous prime is 51022159. The next prime is 51022217. The reversal of 51022197 is 79122015.

It is not a de Polignac number, because 51022197 - 2⁶ = 51022133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51022197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51022597) 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, 14422 + ... + 17607.

It is an arithmetic number, because the mean of its divisors is an integer number (4804500).

Almost surely, 2^51022197 is an apocalyptic number.

It is an amenable number.

51022197 is a deficient number, since it is larger than the sum of its proper divisors (25849803).

51022197 is a wasteful number, since it uses less digits than its factorization.

51022197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32097 (or 32091 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51022197 is about 7142.9823603310. The cubic root of 51022197 is about 370.8967704405.

The spelling of 51022197 in words is "fifty-one million, twenty-two thousand, one hundred ninety-seven".