210155021272 has 32 divisors (see below), whose sum is σ = 450350104320. Its totient is φ = 90062854560.

The previous prime is 210155021231. The next prime is 210155021281. The reversal of 210155021272 is 272120551012.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 210155021272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732843 + ... + 1850149.

It is an arithmetic number, because the mean of its divisors is an integer number (14073440760).

Almost surely, 2^210155021272 is an apocalyptic number.

It is an amenable number.

210155021272 is an abundant number, since it is smaller than the sum of its proper divisors (240195083048).

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

210155021272 is a wasteful number, since it uses less digits than its factorization.

210155021272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149311 (or 149307 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 210155021272 its reverse (272120551012), we get a palindrome (482275572284).

The spelling of 210155021272 in words is "two hundred ten billion, one hundred fifty-five million, twenty-one thousand, two hundred seventy-two".