53621331213 has 32 divisors (see below), whose sum is σ = 76103193600. Its totient is φ = 33486414336.

The previous prime is 53621331199. The next prime is 53621331223. The reversal of 53621331213 is 31213312635.

It is not a de Polignac number, because 53621331213 - 2²¹ = 53619234061 is a prime.

It is a super-2 number, since 2×53621331213² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53621331223) 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, 7089928 + ... + 7097486.

It is an arithmetic number, because the mean of its divisors is an integer number (2378224800).

Almost surely, 2^53621331213 is an apocalyptic number.

It is an amenable number.

53621331213 is a deficient number, since it is larger than the sum of its proper divisors (22481862387).

53621331213 is a wasteful number, since it uses less digits than its factorization.

53621331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8961.

The product of its digits is 9720, while the sum is 30.

Adding to 53621331213 its reverse (31213312635), we get a palindrome (84834643848).

The spelling of 53621331213 in words is "fifty-three billion, six hundred twenty-one million, three hundred thirty-one thousand, two hundred thirteen".