213077506 has 12 divisors (see below), whose sum is σ = 321272406. Its totient is φ = 105989520.

The previous prime is 213077489. The next prime is 213077519. The reversal of 213077506 is 605770312.

It can be written as a sum of positive squares in only one way, i.e., 211964481 + 1113025 = 14559^2 + 1055^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87846 + ... + 90238.

Almost surely, 2^213077506 is an apocalyptic number.

213077506 is a deficient number, since it is larger than the sum of its proper divisors (108194900).

213077506 is an equidigital number, since it uses as much as digits as its factorization.

213077506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817 (or 2606 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 213077506 is about 14597.1745896252. The cubic root of 213077506 is about 597.2816902892.

The spelling of 213077506 in words is "two hundred thirteen million, seventy-seven thousand, five hundred six".