213511015251 has 6 divisors (see below), whose sum is σ = 308404799820. Its totient is φ = 142340676828.

The previous prime is 213511015231. The next prime is 213511015303. The reversal of 213511015251 is 152510115312.

It is a happy number.

213511015251 is a `hidden beast` number, since 2 + 1 + 35 + 1 + 101 + 525 + 1 = 666.

It is not a de Polignac number, because 213511015251 - 2¹¹ = 213511013203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213511015231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11861723061 + ... + 11861723078.

It is an arithmetic number, because the mean of its divisors is an integer number (51400799970).

Almost surely, 2^213511015251 is an apocalyptic number.

213511015251 is a deficient number, since it is larger than the sum of its proper divisors (94893784569).

213511015251 is a wasteful number, since it uses less digits than its factorization.

213511015251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23723446145 (or 23723446142 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 213511015251 in words is "two hundred thirteen billion, five hundred eleven million, fifteen thousand, two hundred fifty-one".