53115211421 has 8 divisors (see below), whose sum is σ = 53501847000. Its totient is φ = 52728978240.

The previous prime is 53115211411. The next prime is 53115211433. The reversal of 53115211421 is 12411251135.

It can be written as a sum of positive squares in 4 ways, for example, as 394459321 + 52720752100 = 19861^2 + 229610^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-53115211421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53115211411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166931 + ... + 366191.

It is an arithmetic number, because the mean of its divisors is an integer number (6687730875).

Almost surely, 2^53115211421 is an apocalyptic number.

It is an amenable number.

53115211421 is a deficient number, since it is larger than the sum of its proper divisors (386635579).

53115211421 is a wasteful number, since it uses less digits than its factorization.

53115211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201199.

The product of its digits is 1200, while the sum is 26.

Adding to 53115211421 its reverse (12411251135), we get a palindrome (65526462556).

The spelling of 53115211421 in words is "fifty-three billion, one hundred fifteen million, two hundred eleven thousand, four hundred twenty-one".