53921551 has 2 divisors, whose sum is σ = 53921552. Its totient is φ = 53921550.

The previous prime is 53921513. The next prime is 53921557. The reversal of 53921551 is 15512935.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53921551 - 2¹⁹ = 53397263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53921557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26960775 + 26960776.

It is an arithmetic number, because the mean of its divisors is an integer number (26960776).

Almost surely, 2^53921551 is an apocalyptic number.

53921551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53921551 is an equidigital number, since it uses as much as digits as its factorization.

53921551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6750, while the sum is 31.

The square root of 53921551 is about 7343.1295099569. The cubic root of 53921551 is about 377.7931900639.

The spelling of 53921551 in words is "fifty-three million, nine hundred twenty-one thousand, five hundred fifty-one".