210440055 has 48 divisors (see below), whose sum is σ = 396200160. Its totient is φ = 95090688.

The previous prime is 210440047. The next prime is 210440063. The reversal of 210440055 is 550044012.

It is an interprime number because it is at equal distance from previous prime (210440047) and next prime (210440063).

It is not a de Polignac number, because 210440055 - 2³ = 210440047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63807 + ... + 67023.

It is an arithmetic number, because the mean of its divisors is an integer number (8254170).

Almost surely, 2^210440055 is an apocalyptic number.

210440055 is a deficient number, since it is larger than the sum of its proper divisors (185760105).

210440055 is a wasteful number, since it uses less digits than its factorization.

210440055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 210440055 is about 14506.5521403261. The cubic root of 210440055 is about 594.8070885566.

Adding to 210440055 its reverse (550044012), we get a palindrome (760484067).

The spelling of 210440055 in words is "two hundred ten million, four hundred forty thousand, fifty-five".