53211121445531 has 4 divisors (see below), whose sum is σ = 60812710223472. Its totient is φ = 45609532667592.

The previous prime is 53211121445527. The next prime is 53211121445551. The reversal of 53211121445531 is 13554412111235.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53211121445531 - 2² = 53211121445527 is a prime.

It is a super-2 number, since 2×53211121445531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53211121445551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3800794388960 + ... + 3800794388973.

It is an arithmetic number, because the mean of its divisors is an integer number (15203177555868).

Almost surely, 2^{53211121445531} is an apocalyptic number.

53211121445531 is a deficient number, since it is larger than the sum of its proper divisors (7601588777941).

53211121445531 is an equidigital number, since it uses as much as digits as its factorization.

53211121445531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601588777940.

The product of its digits is 72000, while the sum is 38.

Adding to 53211121445531 its reverse (13554412111235), we get a palindrome (66765533556766).

The spelling of 53211121445531 in words is "fifty-three trillion, two hundred eleven billion, one hundred twenty-one million, four hundred forty-five thousand, five hundred thirty-one".