36471821 has 8 divisors (see below), whose sum is σ = 37827000. Its totient is φ = 35123200.

The previous prime is 36471797. The next prime is 36471829. The reversal of 36471821 is 12817463.

It can be written as a sum of positive squares in 4 ways, for example, as 7365796 + 29106025 = 2714^2 + 5395^2 .

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

It is a 6-Lehmer number, since φ(36471821) divides (36471821-1)⁶.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36471821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36471829) 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, 11621 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (4728375).

Almost surely, 2^36471821 is an apocalyptic number.

It is an amenable number.

36471821 is a deficient number, since it is larger than the sum of its proper divisors (1355179).

36471821 is a wasteful number, since it uses less digits than its factorization.

36471821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279.

The product of its digits is 8064, while the sum is 32.

The square root of 36471821 is about 6039.1904258766. The cubic root of 36471821 is about 331.6289856717.

The spelling of 36471821 in words is "thirty-six million, four hundred seventy-one thousand, eight hundred twenty-one".