213402536 has 8 divisors (see below), whose sum is σ = 400129770. Its totient is φ = 106701264.

The previous prime is 213402529. The next prime is 213402551. The reversal of 213402536 is 635204312.

It can be written as a sum of positive squares in only one way, i.e., 156400036 + 57002500 = 12506^2 + 7550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13337651 + ... + 13337666.

Almost surely, 2^213402536 is an apocalyptic number.

It is an amenable number.

213402536 is a deficient number, since it is larger than the sum of its proper divisors (186727234).

213402536 is a wasteful number, since it uses less digits than its factorization.

213402536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26675323 (or 26675319 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 213402536 is about 14608.3036660661. The cubic root of 213402536 is about 597.5852352975.

Adding to 213402536 its reverse (635204312), we get a palindrome (848606848).

The spelling of 213402536 in words is "two hundred thirteen million, four hundred two thousand, five hundred thirty-six".