213748705 has 8 divisors (see below), whose sum is σ = 265343400. Its totient is φ = 165102336.

The previous prime is 213748687. The next prime is 213748721. The reversal of 213748705 is 507847312.

It can be written as a sum of positive squares in 4 ways, for example, as 559504 + 213189201 = 748^2 + 14601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213748705 - 2¹¹ = 213746657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736920 + ... + 737209.

It is an arithmetic number, because the mean of its divisors is an integer number (33167925).

Almost surely, 2^213748705 is an apocalyptic number.

It is an amenable number.

213748705 is a deficient number, since it is larger than the sum of its proper divisors (51594695).

213748705 is a wasteful number, since it uses less digits than its factorization.

213748705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474163.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 213748705 is about 14620.1472290808. The cubic root of 213748705 is about 597.9081832388.

The spelling of 213748705 in words is "two hundred thirteen million, seven hundred forty-eight thousand, seven hundred five".