531501413421 has 32 divisors (see below), whose sum is σ = 782618135040. Its totient is φ = 318155342400.

The previous prime is 531501413413. The next prime is 531501413431. The reversal of 531501413421 is 124314105135.

It is not a de Polignac number, because 531501413421 - 2³ = 531501413413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531501413431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10989390 + ... + 11037648.

It is an arithmetic number, because the mean of its divisors is an integer number (24456816720).

Almost surely, 2^531501413421 is an apocalyptic number.

It is an amenable number.

531501413421 is a deficient number, since it is larger than the sum of its proper divisors (251116721619).

531501413421 is a wasteful number, since it uses less digits than its factorization.

531501413421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52377.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 531501413421 its reverse (124314105135), we get a palindrome (655815518556).

The spelling of 531501413421 in words is "five hundred thirty-one billion, five hundred one million, four hundred thirteen thousand, four hundred twenty-one".