213951402 has 64 divisors (see below), whose sum is σ = 556047360. Its totient is φ = 59702832.

The previous prime is 213951391. The next prime is 213951403. The reversal of 213951402 is 204159312.

213951402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213951403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9673 + ... + 22835.

It is an arithmetic number, because the mean of its divisors is an integer number (8688240).

Almost surely, 2^213951402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213951402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278023680).

213951402 is an abundant number, since it is smaller than the sum of its proper divisors (342095958).

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

213951402 is a wasteful number, since it uses less digits than its factorization.

213951402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13224 (or 13218 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 213951402 is about 14627.0776985699. The cubic root of 213951402 is about 598.0971214687.

The spelling of 213951402 in words is "two hundred thirteen million, nine hundred fifty-one thousand, four hundred two".