213653428 has 6 divisors (see below), whose sum is σ = 373893506. Its totient is φ = 106826712.

The previous prime is 213653389. The next prime is 213653437. The reversal of 213653428 is 824356312.

213653428 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 213510544 + 142884 = 14612^2 + 378^2 .

213653428 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 213653393 and 213653402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26706675 + ... + 26706682.

Almost surely, 2^213653428 is an apocalyptic number.

It is an amenable number.

213653428 is a deficient number, since it is larger than the sum of its proper divisors (160240078).

213653428 is a wasteful number, since it uses less digits than its factorization.

213653428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53413361 (or 53413359 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 213653428 is about 14616.8884513771. Note that the first 3 decimals coincide. The cubic root of 213653428 is about 597.8193322299.

The spelling of 213653428 in words is "two hundred thirteen million, six hundred fifty-three thousand, four hundred twenty-eight".