521450131424 has 12 divisors (see below), whose sum is σ = 1026604946304. Its totient is φ = 260725065696.

The previous prime is 521450131379. The next prime is 521450131441. The reversal of 521450131424 is 424131054125.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 16295316607 = 521450131424 / (5 + 2 + 1 + 4 + 5 + 0 + 1 + 3 + 1 + 4 + 2 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8147658272 + ... + 8147658335.

It is an arithmetic number, because the mean of its divisors is an integer number (85550412192).

Almost surely, 2^521450131424 is an apocalyptic number.

It is an amenable number.

521450131424 is a deficient number, since it is larger than the sum of its proper divisors (505154814880).

521450131424 is a wasteful number, since it uses less digits than its factorization.

521450131424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16295316617 (or 16295316609 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 521450131424 its reverse (424131054125), we get a palindrome (945581185549).

The spelling of 521450131424 in words is "five hundred twenty-one billion, four hundred fifty million, one hundred thirty-one thousand, four hundred twenty-four".