65222557 has 16 divisors (see below), whose sum is σ = 70708032. Its totient is φ = 59938560.

The previous prime is 65222551. The next prime is 65222561. The reversal of 65222557 is 75522256.

It is a cyclic number.

It is not a de Polignac number, because 65222557 - 2⁷ = 65222429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65222551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196882 + ... + 197212.

It is an arithmetic number, because the mean of its divisors is an integer number (4419252).

Almost surely, 2^65222557 is an apocalyptic number.

65222557 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

65222557 is a deficient number, since it is larger than the sum of its proper divisors (5485475).

65222557 is a wasteful number, since it uses less digits than its factorization.

65222557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 42000, while the sum is 34.

The square root of 65222557 is about 8076.0483530004. The cubic root of 65222557 is about 402.5309457580.

The spelling of 65222557 in words is "sixty-five million, two hundred twenty-two thousand, five hundred fifty-seven".