538216251 has 16 divisors (see below), whose sum is σ = 739939200. Its totient is φ = 347780160.

The previous prime is 538216241. The next prime is 538216279. The reversal of 538216251 is 152612835.

It is not a de Polignac number, because 538216251 - 2⁶ = 538216187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (538216241) 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, 975 + ... + 32823.

It is an arithmetic number, because the mean of its divisors is an integer number (46246200).

Almost surely, 2^538216251 is an apocalyptic number.

538216251 is a deficient number, since it is larger than the sum of its proper divisors (201722949).

538216251 is a wasteful number, since it uses less digits than its factorization.

538216251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32026.

The product of its digits is 14400, while the sum is 33.

The square root of 538216251 is about 23199.4881624574. The cubic root of 538216251 is about 813.4276589108.

The spelling of 538216251 in words is "five hundred thirty-eight million, two hundred sixteen thousand, two hundred fifty-one".