521163241 has 9 divisors (see below), whose sum is σ = 536498949. Its totient is φ = 506255904.

The previous prime is 521163239. The next prime is 521163287. The reversal of 521163241 is 142361125.

It is a happy number.

The square root of 521163241 is 22829.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13111641 + 508051600 = 3621^2 + 22540^2 .

It is not a de Polignac number, because 521163241 - 2¹ = 521163239 is a prime.

It is a super-2 number, since 2×521163241² = 543222247539248162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521163641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 844365 + ... + 844981.

Almost surely, 2^521163241 is an apocalyptic number.

521163241 is the 22829-th square number.

521163241 is the 11415-th centered octagonal number.

It is an amenable number.

521163241 is a deficient number, since it is larger than the sum of its proper divisors (15335708).

521163241 is an frugal number, since it uses more digits than its factorization.

521163241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 654 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The cubic root of 521163241 is about 804.7443299024.

Multiplying 521163241 by its sum of digits (25), we get a square (13029081025 = 114145²).

The spelling of 521163241 in words is "five hundred twenty-one million, one hundred sixty-three thousand, two hundred forty-one".