164211531 has 8 divisors (see below), whose sum is σ = 238853184. Its totient is φ = 99522120.

The previous prime is 164211527. The next prime is 164211571. The reversal of 164211531 is 135112461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164211531 - 2² = 164211527 is a prime.

It is a super-2 number, since 2×164211531² = 53930853826727922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164211511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488021 + ... + 2488086.

It is an arithmetic number, because the mean of its divisors is an integer number (29856648).

Almost surely, 2^164211531 is an apocalyptic number.

164211531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164211531 is a deficient number, since it is larger than the sum of its proper divisors (74641653).

164211531 is a wasteful number, since it uses less digits than its factorization.

164211531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976121.

The product of its digits is 720, while the sum is 24.

The square root of 164211531 is about 12814.5047114588. The cubic root of 164211531 is about 547.6056033656.

Adding to 164211531 its reverse (135112461), we get a palindrome (299323992).

The spelling of 164211531 in words is "one hundred sixty-four million, two hundred eleven thousand, five hundred thirty-one".