531161801206830 has 24 divisors (see below), whose sum is σ = 1381020683137992. Its totient is φ = 141643146988464.

The previous prime is 531161801206801. The next prime is 531161801206831. The reversal of 531161801206830 is 38602108161135.

531161801206830 is a `hidden beast` number, since 5 + 3 + 1 + 1 + 618 + 0 + 1 + 20 + 6 + 8 + 3 + 0 = 666.

It is a super-2 number, since 2×531161801206830² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531161801206831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2950898895504 + ... + 2950898895683.

It is an arithmetic number, because the mean of its divisors is an integer number (57542528464083).

Almost surely, 2^{531161801206830} is an apocalyptic number.

531161801206830 is an abundant number, since it is smaller than the sum of its proper divisors (849858881931162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531161801206830 is a wasteful number, since it uses less digits than its factorization.

531161801206830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5901797791200 (or 5901797791197 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

Adding to 531161801206830 its reverse (38602108161135), we get a palindrome (569763909367965).

The spelling of 531161801206830 in words is "five hundred thirty-one trillion, one hundred sixty-one billion, eight hundred one million, two hundred six thousand, eight hundred thirty".