541520723 has 4 divisors (see below), whose sum is σ = 541909200. Its totient is φ = 541132248.

The previous prime is 541520711. The next prime is 541520773. The reversal of 541520723 is 327025145.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327025145 = 5 ⋅65405029.

It is a cyclic number.

It is not a de Polignac number, because 541520723 - 2¹² = 541516627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (541520773) 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, 192140 + ... + 194937.

It is an arithmetic number, because the mean of its divisors is an integer number (135477300).

Almost surely, 2^541520723 is an apocalyptic number.

541520723 is a deficient number, since it is larger than the sum of its proper divisors (388477).

541520723 is a wasteful number, since it uses less digits than its factorization.

541520723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388476.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 541520723 is about 23270.5978221446. The cubic root of 541520723 is about 815.0889902451.

Adding to 541520723 its reverse (327025145), we get a palindrome (868545868).

The spelling of 541520723 in words is "five hundred forty-one million, five hundred twenty thousand, seven hundred twenty-three".