212072154 has 48 divisors (see below), whose sum is σ = 493252032. Its totient is φ = 59534784.

The previous prime is 212072153. The next prime is 212072171. The reversal of 212072154 is 451270212.

It is not an unprimeable number, because it can be changed into a prime (212072153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 806227 + ... + 806489.

It is an arithmetic number, because the mean of its divisors is an integer number (10276084).

Almost surely, 2^212072154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212072154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246626016).

212072154 is an abundant number, since it is smaller than the sum of its proper divisors (281179878).

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

212072154 is an equidigital number, since it uses as much as digits as its factorization.

212072154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 212072154 is about 14562.6973463023. The cubic root of 212072154 is about 596.3408351078.

It can be divided in two parts, 212072 and 154, that added together give a triangular number (212226 = T₆₅₁).

The spelling of 212072154 in words is "two hundred twelve million, seventy-two thousand, one hundred fifty-four".