538421387202251 has 8 divisors (see below), whose sum is σ = 616416379248384. Its totient is φ = 460695807910440.

The previous prime is 538421387202227. The next prime is 538421387202317. The reversal of 538421387202251 is 152202783124835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 538421387202251 - 2⁴² = 534023340691147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 538421387202193 and 538421387202202.

It is not an unprimeable number, because it can be changed into a prime (538421387207251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67353184295 + ... + 67353192288.

It is an arithmetic number, because the mean of its divisors is an integer number (77052047406048).

Almost surely, 2^{538421387202251} is an apocalyptic number.

538421387202251 is a deficient number, since it is larger than the sum of its proper divisors (77994992046133).

538421387202251 is a wasteful number, since it uses less digits than its factorization.

538421387202251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134706377161.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 538421387202251 in words is "five hundred thirty-eight trillion, four hundred twenty-one billion, three hundred eighty-seven million, two hundred two thousand, two hundred fifty-one".