212531465 has 16 divisors (see below), whose sum is σ = 257342400. Its totient is φ = 168497472.

The previous prime is 212531461. The next prime is 212531483. The reversal of 212531465 is 564135212.

212531465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212531465 - 2² = 212531461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212531461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479534 + ... + 479976.

It is an arithmetic number, because the mean of its divisors is an integer number (16083900).

Almost surely, 2^212531465 is an apocalyptic number.

It is an amenable number.

212531465 is a deficient number, since it is larger than the sum of its proper divisors (44810935).

212531465 is a wasteful number, since it uses less digits than its factorization.

212531465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its digits is 7200, while the sum is 29.

The square root of 212531465 is about 14578.4589377616. The cubic root of 212531465 is about 596.7710478031.

Adding to 212531465 its reverse (564135212), we get a palindrome (776666677).

The spelling of 212531465 in words is "two hundred twelve million, five hundred thirty-one thousand, four hundred sixty-five".