53135431321 has 16 divisors (see below), whose sum is σ = 61280665600. Its totient is φ = 45129707280.

The previous prime is 53135431273. The next prime is 53135431351. The reversal of 53135431321 is 12313453135.

It is a happy number.

It is not a de Polignac number, because 53135431321 - 2²¹ = 53133334169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53135431351) 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, 684130 + ... + 757828.

It is an arithmetic number, because the mean of its divisors is an integer number (3830041600).

Almost surely, 2^53135431321 is an apocalyptic number.

It is an amenable number.

53135431321 is a deficient number, since it is larger than the sum of its proper divisors (8145234279).

53135431321 is a wasteful number, since it uses less digits than its factorization.

53135431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74644.

The product of its digits is 16200, while the sum is 31.

Adding to 53135431321 its reverse (12313453135), we get a palindrome (65448884456).

The spelling of 53135431321 in words is "fifty-three billion, one hundred thirty-five million, four hundred thirty-one thousand, three hundred twenty-one".