538022557 has 4 divisors (see below), whose sum is σ = 548173980. Its totient is φ = 527871136.

The previous prime is 538022549. The next prime is 538022581. The reversal of 538022557 is 755220835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216501796 + 321520761 = 14714^2 + 17931^2 .

It is a cyclic number.

It is not a de Polignac number, because 538022557 - 2³ = 538022549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538025557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5075632 + ... + 5075737.

It is an arithmetic number, because the mean of its divisors is an integer number (137043495).

Almost surely, 2^538022557 is an apocalyptic number.

It is an amenable number.

538022557 is a deficient number, since it is larger than the sum of its proper divisors (10151423).

538022557 is a wasteful number, since it uses less digits than its factorization.

538022557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10151422.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 538022557 is about 23195.3132550522. The cubic root of 538022557 is about 813.3300680503.

The spelling of 538022557 in words is "five hundred thirty-eight million, twenty-two thousand, five hundred fifty-seven".