53371621 has 2 divisors, whose sum is σ = 53371622. Its totient is φ = 53371620.

The previous prime is 53371607. The next prime is 53371657. The reversal of 53371621 is 12617335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 17969121 = 5950^2 + 4239^2 .

It is a cyclic number.

It is not a de Polignac number, because 53371621 - 2¹⁵ = 53338853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53371621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53371121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26685810 + 26685811.

It is an arithmetic number, because the mean of its divisors is an integer number (26685811).

Almost surely, 2^53371621 is an apocalyptic number.

It is an amenable number.

53371621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53371621 is an equidigital number, since it uses as much as digits as its factorization.

53371621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 53371621 is about 7305.5883404419. The cubic root of 53371621 is about 376.5044651907.

Adding to 53371621 its reverse (12617335), we get a palindrome (65988956).

The spelling of 53371621 in words is "fifty-three million, three hundred seventy-one thousand, six hundred twenty-one".