212251154004 has 48 divisors (see below), whose sum is σ = 550329438400. Its totient is φ = 70744127328.

The previous prime is 212251153987. The next prime is 212251154021. The reversal of 212251154004 is 400451152212.

It is a happy number.

212251154004 is a `hidden beast` number, since 2 + 1 + 2 + 251 + 1 + 5 + 400 + 4 = 666.

212251154004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212251153987) and next prime (212251154021).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1232127 + ... + 1393785.

Almost surely, 2^212251154004 is an apocalyptic number.

It is an amenable number.

212251154004 is an abundant number, since it is smaller than the sum of its proper divisors (338078284396).

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

212251154004 is a wasteful number, since it uses less digits than its factorization.

212251154004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173829 (or 173821 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 212251154004 in words is "two hundred twelve billion, two hundred fifty-one million, one hundred fifty-four thousand, four".