213651057 has 8 divisors (see below), whose sum is σ = 287688960. Its totient is φ = 141023600.

The previous prime is 213651001. The next prime is 213651059. The reversal of 213651057 is 750156312.

213651057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 213651057 - 2¹⁵ = 213618289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213651059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352257 + ... + 352862.

It is an arithmetic number, because the mean of its divisors is an integer number (35961120).

Almost surely, 2^213651057 is an apocalyptic number.

It is an amenable number.

213651057 is a deficient number, since it is larger than the sum of its proper divisors (74037903).

213651057 is a wasteful number, since it uses less digits than its factorization.

213651057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705223.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 213651057 is about 14616.8073463394. The cubic root of 213651057 is about 597.8171208060.

It can be divided in two parts, 21365 and 1057, that added together give a palindrome (22422).

The spelling of 213651057 in words is "two hundred thirteen million, six hundred fifty-one thousand, fifty-seven".