55627591 has 4 divisors (see below), whose sum is σ = 55688400. Its totient is φ = 55566784.

The previous prime is 55627589. The next prime is 55627633. The reversal of 55627591 is 19572655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55627591 - 2¹ = 55627589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55627541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29011 + ... + 30868.

It is an arithmetic number, because the mean of its divisors is an integer number (13922100).

Almost surely, 2^55627591 is an apocalyptic number.

55627591 is a deficient number, since it is larger than the sum of its proper divisors (60809).

55627591 is an equidigital number, since it uses as much as digits as its factorization.

55627591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60808.

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

The square root of 55627591 is about 7458.3906441001. The cubic root of 55627591 is about 381.7362629537.

The spelling of 55627591 in words is "fifty-five million, six hundred twenty-seven thousand, five hundred ninety-one".