521113144 has 16 divisors (see below), whose sum is σ = 983313000. Its totient is φ = 258896352.

The previous prime is 521113127. The next prime is 521113147. The reversal of 521113144 is 441311125.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521113147) 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, 206194 + ... + 208705.

Almost surely, 2^521113144 is an apocalyptic number.

It is an amenable number.

521113144 is a deficient number, since it is larger than the sum of its proper divisors (462199856).

521113144 is a wasteful number, since it uses less digits than its factorization.

521113144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415062 (or 415058 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 521113144 is about 22827.9027508004. The cubic root of 521113144 is about 804.7185436321.

Adding to 521113144 its reverse (441311125), we get a palindrome (962424269).

It can be divided in two parts, 52111 and 3144, that added together give a palindrome (55255).

The spelling of 521113144 in words is "five hundred twenty-one million, one hundred thirteen thousand, one hundred forty-four".