55731523 has 2 divisors, whose sum is σ = 55731524. Its totient is φ = 55731522.

The previous prime is 55731449. The next prime is 55731527. The reversal of 55731523 is 32513755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55731523 is a prime.

It is not a weakly prime, because it can be changed into another prime (55731527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27865761 + 27865762.

It is an arithmetic number, because the mean of its divisors is an integer number (27865762).

Almost surely, 2^55731523 is an apocalyptic number.

55731523 is a deficient number, since it is larger than the sum of its proper divisors (1).

55731523 is an equidigital number, since it uses as much as digits as its factorization.

55731523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 31.

The square root of 55731523 is about 7465.3548475608. The cubic root of 55731523 is about 381.9738544645.

The spelling of 55731523 in words is "fifty-five million, seven hundred thirty-one thousand, five hundred twenty-three".