51222445 has 16 divisors (see below), whose sum is σ = 65322288. Its totient is φ = 38425600.

The previous prime is 51222427. The next prime is 51222463. The reversal of 51222445 is 54422215.

It is an interprime number because it is at equal distance from previous prime (51222427) and next prime (51222463).

It can be written as a sum of positive squares in 8 ways, for example, as 9400356 + 41822089 = 3066^2 + 6467^2 .

It is not a de Polignac number, because 51222445 - 2⁷ = 51222317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25995 + ... + 27895.

It is an arithmetic number, because the mean of its divisors is an integer number (4082643).

Almost surely, 2^51222445 is an apocalyptic number.

It is an amenable number.

51222445 is a deficient number, since it is larger than the sum of its proper divisors (14099843).

51222445 is a wasteful number, since it uses less digits than its factorization.

51222445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240.

The product of its digits is 3200, while the sum is 25.

The square root of 51222445 is about 7156.9857482043. The cubic root of 51222445 is about 371.3813594190.

The spelling of 51222445 in words is "fifty-one million, two hundred twenty-two thousand, four hundred forty-five".