213402040 has 16 divisors (see below), whose sum is σ = 480154680. Its totient is φ = 85360800.

The previous prime is 213402031. The next prime is 213402041. The reversal of 213402040 is 40204312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213402041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2667486 + ... + 2667565.

Almost surely, 2^213402040 is an apocalyptic number.

213402040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213402040 is an abundant number, since it is smaller than the sum of its proper divisors (266752640).

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

213402040 is a wasteful number, since it uses less digits than its factorization.

213402040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335062 (or 5335058 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 213402040 is about 14608.2866894102. The cubic root of 213402040 is about 597.5847723188.

Adding to 213402040 its reverse (40204312), we get a palindrome (253606352).

The spelling of 213402040 in words is "two hundred thirteen million, four hundred two thousand, forty".