211145154 has 48 divisors (see below), whose sum is σ = 476163360. Its totient is φ = 61900800.

The previous prime is 211145153. The next prime is 211145173. The reversal of 211145154 is 451541112.

It is not an unprimeable number, because it can be changed into a prime (211145153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61762 + ... + 65090.

It is an arithmetic number, because the mean of its divisors is an integer number (9920070).

Almost surely, 2^211145154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211145154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238081680).

211145154 is an abundant number, since it is smaller than the sum of its proper divisors (265018206).

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

211145154 is a wasteful number, since it uses less digits than its factorization.

211145154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3376 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 211145154 is about 14530.8345940624. The cubic root of 211145154 is about 595.4706668263.

Adding to 211145154 its reverse (451541112), we get a palindrome (662686266).

The spelling of 211145154 in words is "two hundred eleven million, one hundred forty-five thousand, one hundred fifty-four".