53771551 has 2 divisors, whose sum is σ = 53771552. Its totient is φ = 53771550.

The previous prime is 53771519. The next prime is 53771569. The reversal of 53771551 is 15517735.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53771551 - 2⁵ = 53771519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53774551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26885775 + 26885776.

It is an arithmetic number, because the mean of its divisors is an integer number (26885776).

Almost surely, 2^53771551 is an apocalyptic number.

53771551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53771551 is an equidigital number, since it uses as much as digits as its factorization.

53771551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18375, while the sum is 34.

The square root of 53771551 is about 7332.9087680129. The cubic root of 53771551 is about 377.4425472848.

The spelling of 53771551 in words is "fifty-three million, seven hundred seventy-one thousand, five hundred fifty-one".