213081456 has 160 divisors (see below), whose sum is σ = 653672448. Its totient is φ = 58556160.

The previous prime is 213081431. The next prime is 213081461. The reversal of 213081456 is 654180312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1626511 + ... + 1626641.

Almost surely, 2^213081456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213081456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326836224).

213081456 is an abundant number, since it is smaller than the sum of its proper divisors (440590992).

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

213081456 is a wasteful number, since it uses less digits than its factorization.

213081456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 213081456 is about 14597.3098891542. The cubic root of 213081456 is about 597.2853810403.

The spelling of 213081456 in words is "two hundred thirteen million, eighty-one thousand, four hundred fifty-six".