521741103451631 has 16 divisors (see below), whose sum is σ = 605789905032000. Its totient is φ = 440098179268608.

The previous prime is 521741103451583. The next prime is 521741103451651. The reversal of 521741103451631 is 136154301147125.

It is not a de Polignac number, because 521741103451631 - 2¹⁸ = 521741103189487 is a prime.

It is a super-2 number, since 2×521741103451631² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521741103451651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136763626 + ... + 1137222503.

It is an arithmetic number, because the mean of its divisors is an integer number (37861869064500).

Almost surely, 2^{521741103451631} is an apocalyptic number.

521741103451631 is a deficient number, since it is larger than the sum of its proper divisors (84048801580369).

521741103451631 is a wasteful number, since it uses less digits than its factorization.

521741103451631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273986658.

The product of its (nonzero) digits is 302400, while the sum is 44.

Adding to 521741103451631 its reverse (136154301147125), we get a palindrome (657895404598756).

The spelling of 521741103451631 in words is "five hundred twenty-one trillion, seven hundred forty-one billion, one hundred three million, four hundred fifty-one thousand, six hundred thirty-one".