213155454402 has 96 divisors (see below), whose sum is σ = 516604023936. Its totient is φ = 62956857600.

The previous prime is 213155454377. The next prime is 213155454437. The reversal of 213155454402 is 204454551312.

213155454402 is a `hidden beast` number, since 2 + 13 + 1 + 554 + 54 + 40 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8860963 + ... + 8884985.

It is an arithmetic number, because the mean of its divisors is an integer number (5381291916).

Almost surely, 2^213155454402 is an apocalyptic number.

213155454402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 213155454402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258302011968).

213155454402 is an abundant number, since it is smaller than the sum of its proper divisors (303448569534).

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

213155454402 is a wasteful number, since it uses less digits than its factorization.

213155454402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25176 (or 25173 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 213155454402 in words is "two hundred thirteen billion, one hundred fifty-five million, four hundred fifty-four thousand, four hundred two".