521130340542 has 64 divisors (see below), whose sum is σ = 1228543801344. Its totient is φ = 144283526400.

The previous prime is 521130340537. The next prime is 521130340553. The reversal of 521130340542 is 245043031125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1107543 + ... + 1506290.

It is an arithmetic number, because the mean of its divisors is an integer number (19195996896).

Almost surely, 2^521130340542 is an apocalyptic number.

521130340542 is an abundant number, since it is smaller than the sum of its proper divisors (707413460802).

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

521130340542 is a wasteful number, since it uses less digits than its factorization.

521130340542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613993.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 521130340542 its reverse (245043031125), we get a palindrome (766173371667).

The spelling of 521130340542 in words is "five hundred twenty-one billion, one hundred thirty million, three hundred forty thousand, five hundred forty-two".