55785101 has 4 divisors (see below), whose sum is σ = 55937472. Its totient is φ = 55632732.

The previous prime is 55785043. The next prime is 55785113. The reversal of 55785101 is 10158755.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55785101 - 2¹⁰ = 55784077 is a prime.

It is a super-2 number, since 2×55785101² = 6223954987160402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55785161) 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, 75635 + ... + 76368.

It is an arithmetic number, because the mean of its divisors is an integer number (13984368).

Almost surely, 2^55785101 is an apocalyptic number.

It is an amenable number.

55785101 is a deficient number, since it is larger than the sum of its proper divisors (152371).

55785101 is a wasteful number, since it uses less digits than its factorization.

55785101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152370.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 55785101 is about 7468.9424284834. The cubic root of 55785101 is about 382.0962199253.

It can be divided in two parts, 557 and 85101, that added together give a palindrome (85658).

The spelling of 55785101 in words is "fifty-five million, seven hundred eighty-five thousand, one hundred one".