538051261 has 4 divisors (see below), whose sum is σ = 586965024. Its totient is φ = 489137500.

The previous prime is 538051229. The next prime is 538051271. The reversal of 538051261 is 162150835.

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 538051261 - 2⁵ = 538051229 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 (538051271) 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, 24456865 + ... + 24456886.

It is an arithmetic number, because the mean of its divisors is an integer number (146741256).

Almost surely, 2^538051261 is an apocalyptic number.

It is an amenable number.

538051261 is a deficient number, since it is larger than the sum of its proper divisors (48913763).

538051261 is a wasteful number, since it uses less digits than its factorization.

538051261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48913762.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 538051261 is about 23195.9319924852. The cubic root of 538051261 is about 813.3445317630.

The spelling of 538051261 in words is "five hundred thirty-eight million, fifty-one thousand, two hundred sixty-one".