213157577 has 6 divisors (see below), whose sum is σ = 225760014. Its totient is φ = 200562240.

The previous prime is 213157507. The next prime is 213157601. The reversal of 213157577 is 775751312.

It can be written as a sum of positive squares in 3 ways, for example, as 41783296 + 171374281 = 6464^2 + 13091^2 .

It is not a de Polignac number, because 213157577 - 2¹² = 213153481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213157577.

It is not an unprimeable number, because it can be changed into a prime (213157507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58427 + ... + 61967.

It is an arithmetic number, because the mean of its divisors is an integer number (37626669).

Almost surely, 2^213157577 is an apocalyptic number.

It is an amenable number.

213157577 is a deficient number, since it is larger than the sum of its proper divisors (12602437).

213157577 is an frugal number, since it uses more digits than its factorization.

213157577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7099 (or 3558 counting only the distinct ones).

The product of its digits is 51450, while the sum is 38.

The square root of 213157577 is about 14599.9170203121. The cubic root of 213157577 is about 597.3564971107.

The spelling of 213157577 in words is "two hundred thirteen million, one hundred fifty-seven thousand, five hundred seventy-seven".