55597787 has 8 divisors (see below), whose sum is σ = 65590272. Its totient is φ = 46117800.

The previous prime is 55597783. The next prime is 55597793. The reversal of 55597787 is 78779555.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55597787 - 2² = 55597783 is a prime.

It is a super-2 number, since 2×55597787² = 6182227838594738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55597783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127889 + ... + 128322.

It is an arithmetic number, because the mean of its divisors is an integer number (8198784).

Almost surely, 2^55597787 is an apocalyptic number.

55597787 is a deficient number, since it is larger than the sum of its proper divisors (9992485).

55597787 is a wasteful number, since it uses less digits than its factorization.

55597787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256249.

The product of its digits is 3087000, while the sum is 53.

The square root of 55597787 is about 7456.3923582387. The cubic root of 55597787 is about 381.6680755676.

The spelling of 55597787 in words is "fifty-five million, five hundred ninety-seven thousand, seven hundred eighty-seven".