210400023 has 8 divisors (see below), whose sum is σ = 280673536. Its totient is φ = 140196600.

The previous prime is 210400013. The next prime is 210400031. The reversal of 210400023 is 320004012.

210400023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-210400023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210399981 and 210400008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210400013) 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, 10063 + ... + 22848.

It is an arithmetic number, because the mean of its divisors is an integer number (35084192).

Almost surely, 2^210400023 is an apocalyptic number.

210400023 is a deficient number, since it is larger than the sum of its proper divisors (70273513).

210400023 is a wasteful number, since it uses less digits than its factorization.

210400023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35045.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 210400023 is about 14505.1722843957. The cubic root of 210400023 is about 594.7693694582.

Adding to 210400023 its reverse (320004012), we get a palindrome (530404035).

The spelling of 210400023 in words is "two hundred ten million, four hundred thousand, twenty-three".