212161497 has 4 divisors (see below), whose sum is σ = 282882000. Its totient is φ = 141440996.

The previous prime is 212161471. The next prime is 212161507. The reversal of 212161497 is 794161212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212161497 - 2¹⁴ = 212145113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212161457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35360247 + ... + 35360252.

It is an arithmetic number, because the mean of its divisors is an integer number (70720500).

Almost surely, 2^212161497 is an apocalyptic number.

It is an amenable number.

212161497 is a deficient number, since it is larger than the sum of its proper divisors (70720503).

212161497 is an equidigital number, since it uses as much as digits as its factorization.

212161497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70720502.

The product of its digits is 6048, while the sum is 33.

The square root of 212161497 is about 14565.7645525389. The cubic root of 212161497 is about 596.4245666714.

The spelling of 212161497 in words is "two hundred twelve million, one hundred sixty-one thousand, four hundred ninety-seven".