213478655000 has 160 divisors (see below), whose sum is σ = 541987446000. Its totient is φ = 78335424000.

The previous prime is 213478654993. The next prime is 213478655009. The reversal of 213478655000 is 556874312.

It is a super-2 number, since 2×213478655000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213478655009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10584926 + ... + 10605074.

Almost surely, 2^213478655000 is an apocalyptic number.

213478655000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213478655000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270993723000).

213478655000 is an abundant number, since it is smaller than the sum of its proper divisors (328508791000).

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

213478655000 is a wasteful number, since it uses less digits than its factorization.

213478655000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20351 (or 20332 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 213478655000 in words is "two hundred thirteen billion, four hundred seventy-eight million, six hundred fifty-five thousand".