53721851 has 2 divisors, whose sum is σ = 53721852. Its totient is φ = 53721850.

The previous prime is 53721847. The next prime is 53721901. The reversal of 53721851 is 15812735.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53721851 - 2² = 53721847 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (53721251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860925 + 26860926.

It is an arithmetic number, because the mean of its divisors is an integer number (26860926).

Almost surely, 2^53721851 is an apocalyptic number.

53721851 is a deficient number, since it is larger than the sum of its proper divisors (1).

53721851 is an equidigital number, since it uses as much as digits as its factorization.

53721851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 32.

The square root of 53721851 is about 7329.5191520317. The cubic root of 53721851 is about 377.3262238342.

The spelling of 53721851 in words is "fifty-three million, seven hundred twenty-one thousand, eight hundred fifty-one".