53221001531 has 16 divisors (see below), whose sum is σ = 55346454528. Its totient is φ = 51122080800.

The previous prime is 53221001527. The next prime is 53221001557. The reversal of 53221001531 is 13510012235.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 53221001531 - 2² = 53221001527 is a prime.

It is a super-2 number, since 2×53221001531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53221001497 and 53221001506.

It is not an unprimeable number, because it can be changed into a prime (53221051531) 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, 3376190 + ... + 3391916.

It is an arithmetic number, because the mean of its divisors is an integer number (3459153408).

Almost surely, 2^53221001531 is an apocalyptic number.

53221001531 is a deficient number, since it is larger than the sum of its proper divisors (2125452997).

53221001531 is a wasteful number, since it uses less digits than its factorization.

53221001531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16562.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 53221001531 its reverse (13510012235), we get a palindrome (66731013766).

The spelling of 53221001531 in words is "fifty-three billion, two hundred twenty-one million, one thousand, five hundred thirty-one".