213528783 has 32 divisors (see below), whose sum is σ = 325427200. Its totient is φ = 123451776.

The previous prime is 213528761. The next prime is 213528797. The reversal of 213528783 is 387825312.

It is not a de Polignac number, because 213528783 - 2²⁰ = 212480207 is a prime.

It is a super-2 number, since 2×213528783² = 91189082338922178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213528743) 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, 92973 + ... + 95241.

It is an arithmetic number, because the mean of its divisors is an integer number (10169600).

Almost surely, 2^213528783 is an apocalyptic number.

213528783 is a deficient number, since it is larger than the sum of its proper divisors (111898417).

213528783 is a wasteful number, since it uses less digits than its factorization.

213528783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431.

The product of its digits is 80640, while the sum is 39.

The square root of 213528783 is about 14612.6240969923. The cubic root of 213528783 is about 597.7030540643.

It can be divided in two parts, 21352 and 8783, that added together give a triangular number (30135 = T₂₄₅).

The spelling of 213528783 in words is "two hundred thirteen million, five hundred twenty-eight thousand, seven hundred eighty-three".