538401161 has 4 divisors (see below), whose sum is σ = 538588032. Its totient is φ = 538214292.

The previous prime is 538401107. The next prime is 538401167. The reversal of 538401161 is 161104835.

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 538401161 - 2²² = 534206857 is a prime.

It is a super-2 number, since 2×538401161² = 579751620332295842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (538401167) 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, 89045 + ... + 94898.

It is an arithmetic number, because the mean of its divisors is an integer number (134647008).

Almost surely, 2^538401161 is an apocalyptic number.

It is an amenable number.

538401161 is a deficient number, since it is larger than the sum of its proper divisors (186871).

538401161 is a wasteful number, since it uses less digits than its factorization.

538401161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186870.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 538401161 is about 23203.4730374571. The cubic root of 538401161 is about 813.5208021943.

Adding to 538401161 its reverse (161104835), we get a palindrome (699505996).

The spelling of 538401161 in words is "five hundred thirty-eight million, four hundred one thousand, one hundred sixty-one".