210155040 has 96 divisors (see below), whose sum is σ = 735557760. Its totient is φ = 56040192.

The previous prime is 210154993. The next prime is 210155051. The reversal of 210155040 is 40551012.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 15 ways as a sum of consecutive naturals, for example, 20004 + ... + 28643.

It is an arithmetic number, because the mean of its divisors is an integer number (7662060).

Almost surely, 2^210155040 is an apocalyptic number.

210155040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210155040 is an abundant number, since it is smaller than the sum of its proper divisors (525402720).

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

210155040 is a wasteful number, since it uses less digits than its factorization.

210155040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48671 (or 48657 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 210155040 is about 14496.7251474255. The cubic root of 210155040 is about 594.5384363818.

The spelling of 210155040 in words is "two hundred ten million, one hundred fifty-five thousand, forty".