55737551 has 2 divisors, whose sum is σ = 55737552. Its totient is φ = 55737550.

The previous prime is 55737527. The next prime is 55737553. The reversal of 55737551 is 15573755.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55737551 is a prime.

Together with 55737553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55737553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27868775 + 27868776.

It is an arithmetic number, because the mean of its divisors is an integer number (27868776).

Almost surely, 2^55737551 is an apocalyptic number.

55737551 is a deficient number, since it is larger than the sum of its proper divisors (1).

55737551 is an equidigital number, since it uses as much as digits as its factorization.

55737551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91875, while the sum is 38.

The square root of 55737551 is about 7465.7585682903. The cubic root of 55737551 is about 381.9876255780.

The spelling of 55737551 in words is "fifty-five million, seven hundred thirty-seven thousand, five hundred fifty-one".