164441731 has 4 divisors (see below), whose sum is σ = 174114792. Its totient is φ = 154768672.

The previous prime is 164441729. The next prime is 164441737. The reversal of 164441731 is 137144461.

164441731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137144461 = 89 ⋅1540949.

It is a cyclic number.

It is not a de Polignac number, because 164441731 - 2¹ = 164441729 is a prime.

It is a super-2 number, since 2×164441731² = 54082165788552722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164441693 and 164441702.

It is not an unprimeable number, because it can be changed into a prime (164441737) 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, 4836505 + ... + 4836538.

It is an arithmetic number, because the mean of its divisors is an integer number (43528698).

Almost surely, 2^164441731 is an apocalyptic number.

164441731 is a deficient number, since it is larger than the sum of its proper divisors (9673061).

164441731 is an equidigital number, since it uses as much as digits as its factorization.

164441731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9673060.

The product of its digits is 8064, while the sum is 31.

The square root of 164441731 is about 12823.4835750665. The cubic root of 164441731 is about 547.8613709311.

The spelling of 164441731 in words is "one hundred sixty-four million, four hundred forty-one thousand, seven hundred thirty-one".