53721155233 has 2 divisors, whose sum is σ = 53721155234. Its totient is φ = 53721155232.

The previous prime is 53721155231. The next prime is 53721155261. The reversal of 53721155233 is 33255112735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33194289249 + 20526865984 = 182193^2 + 143272^2 .

It is a cyclic number.

It is not a de Polignac number, because 53721155233 - 2¹ = 53721155231 is a prime.

Together with 53721155231, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 53721155192 and 53721155201.

It is not a weakly prime, because it can be changed into another prime (53721155231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860577616 + 26860577617.

It is an arithmetic number, because the mean of its divisors is an integer number (26860577617).

Almost surely, 2^53721155233 is an apocalyptic number.

It is an amenable number.

53721155233 is a deficient number, since it is larger than the sum of its proper divisors (1).

53721155233 is an equidigital number, since it uses as much as digits as its factorization.

53721155233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 37.

Adding to 53721155233 its reverse (33255112735), we get a palindrome (86976267968).

The spelling of 53721155233 in words is "fifty-three billion, seven hundred twenty-one million, one hundred fifty-five thousand, two hundred thirty-three".