55572691 has 2 divisors, whose sum is σ = 55572692. Its totient is φ = 55572690.

The previous prime is 55572683. The next prime is 55572703. The reversal of 55572691 is 19627555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55572691 - 2³ = 55572683 is a prime.

It is not a weakly prime, because it can be changed into another prime (55572661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27786345 + 27786346.

It is an arithmetic number, because the mean of its divisors is an integer number (27786346).

Almost surely, 2^55572691 is an apocalyptic number.

55572691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55572691 is an equidigital number, since it uses as much as digits as its factorization.

55572691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 40.

The square root of 55572691 is about 7454.7093169352. The cubic root of 55572691 is about 381.6106405264.

The spelling of 55572691 in words is "fifty-five million, five hundred seventy-two thousand, six hundred ninety-one".