213554345540 has 48 divisors (see below), whose sum is σ = 449957722032. Its totient is φ = 85137432576.

The previous prime is 213554345503. The next prime is 213554345551. The reversal of 213554345540 is 45543455312.

It can be written as a sum of positive squares in 8 ways, for example, as 55100989696 + 158453355844 = 234736^2 + 398062^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31249964 + ... + 31256796.

It is an arithmetic number, because the mean of its divisors is an integer number (9374119209).

Almost surely, 2^213554345540 is an apocalyptic number.

213554345540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213554345540 is an abundant number, since it is smaller than the sum of its proper divisors (236403376492).

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

213554345540 is a wasteful number, since it uses less digits than its factorization.

213554345540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11816 (or 11814 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 213554345540 in words is "two hundred thirteen billion, five hundred fifty-four million, three hundred forty-five thousand, five hundred forty".