538345181 has 4 divisors (see below), whose sum is σ = 587285664. Its totient is φ = 489404700.

The previous prime is 538345177. The next prime is 538345187. The reversal of 538345181 is 181543835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 538345181 - 2² = 538345177 is a prime.

It is a super-2 number, since 2×538345181² = 579631067811845522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538345187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24470225 + ... + 24470246.

It is an arithmetic number, because the mean of its divisors is an integer number (146821416).

Almost surely, 2^538345181 is an apocalyptic number.

It is an amenable number.

538345181 is a deficient number, since it is larger than the sum of its proper divisors (48940483).

538345181 is a wasteful number, since it uses less digits than its factorization.

538345181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48940482.

The product of its digits is 57600, while the sum is 38.

The square root of 538345181 is about 23202.2667211633. The cubic root of 538345181 is about 813.4926060733.

The spelling of 538345181 in words is "five hundred thirty-eight million, three hundred forty-five thousand, one hundred eighty-one".