213511015252 has 6 divisors (see below), whose sum is σ = 373644276698. Its totient is φ = 106755507624.

The previous prime is 213511015231. The next prime is 213511015303. The reversal of 213511015252 is 252510115312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 208297308816 + 5213706436 = 456396^2 + 72206^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213511015252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26688876903 + ... + 26688876910.

Almost surely, 2^213511015252 is an apocalyptic number.

It is an amenable number.

213511015252 is a deficient number, since it is larger than the sum of its proper divisors (160133261446).

213511015252 is a wasteful number, since it uses less digits than its factorization.

213511015252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53377753817 (or 53377753815 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 213511015252 in words is "two hundred thirteen billion, five hundred eleven million, fifteen thousand, two hundred fifty-two".