212345440154 has 16 divisors (see below), whose sum is σ = 318910369536. Its totient is φ = 106042029600.

The previous prime is 212345440127. The next prime is 212345440171. The reversal of 212345440154 is 451044543212.

It is a happy 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, 14707319 + ... + 14721749.

It is an arithmetic number, because the mean of its divisors is an integer number (19931898096).

Almost surely, 2^212345440154 is an apocalyptic number.

212345440154 is a deficient number, since it is larger than the sum of its proper divisors (106564929382).

212345440154 is a wasteful number, since it uses less digits than its factorization.

212345440154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22981.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 212345440154 its reverse (451044543212), we get a palindrome (663389983366).

The spelling of 212345440154 in words is "two hundred twelve billion, three hundred forty-five million, four hundred forty thousand, one hundred fifty-four".