210145040 has 40 divisors (see below), whose sum is σ = 558386880. Its totient is φ = 72049536.

The previous prime is 210145009. The next prime is 210145057. The reversal of 210145040 is 40541012.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187070 + ... + 188189.

It is an arithmetic number, because the mean of its divisors is an integer number (13959672).

Almost surely, 2^210145040 is an apocalyptic number.

210145040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210145040 is an abundant number, since it is smaller than the sum of its proper divisors (348241840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210145040 is a wasteful number, since it uses less digits than its factorization.

210145040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375279 (or 375273 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 210145040 is about 14496.3802378387. The cubic root of 210145040 is about 594.5290060763.

Adding to 210145040 its reverse (40541012), we get a palindrome (250686052).

The spelling of 210145040 in words is "two hundred ten million, one hundred forty-five thousand, forty".