212649537 has 4 divisors (see below), whose sum is σ = 283532720. Its totient is φ = 141766356.

The previous prime is 212649527. The next prime is 212649551. The reversal of 212649537 is 735946212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212649537 - 2¹⁴ = 212633153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212649495 and 212649504.

It is not an unprimeable number, because it can be changed into a prime (212649527) 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, 35441587 + ... + 35441592.

It is an arithmetic number, because the mean of its divisors is an integer number (70883180).

Almost surely, 2^212649537 is an apocalyptic number.

It is an amenable number.

212649537 is a deficient number, since it is larger than the sum of its proper divisors (70883183).

212649537 is an equidigital number, since it uses as much as digits as its factorization.

212649537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70883182.

The product of its digits is 90720, while the sum is 39.

The square root of 212649537 is about 14582.5079118785. The cubic root of 212649537 is about 596.8815395316.

The spelling of 212649537 in words is "two hundred twelve million, six hundred forty-nine thousand, five hundred thirty-seven".