36471981 has 16 divisors (see below), whose sum is σ = 59851904. Its totient is φ = 19237824.

The previous prime is 36471979. The next prime is 36472013. The reversal of 36471981 is 18917463.

It is not a de Polignac number, because 36471981 - 2¹ = 36471979 is a prime.

It is a super-2 number, since 2×36471981² = 2660410796128722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36471901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66526 + ... + 67071.

It is an arithmetic number, because the mean of its divisors is an integer number (3740744).

Almost surely, 2^36471981 is an apocalyptic number.

It is an amenable number.

36471981 is a deficient number, since it is larger than the sum of its proper divisors (23379923).

36471981 is a wasteful number, since it uses less digits than its factorization.

36471981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133620.

The product of its digits is 36288, while the sum is 39.

The square root of 36471981 is about 6039.2036726708. The cubic root of 36471981 is about 331.6294706175.

The spelling of 36471981 in words is "thirty-six million, four hundred seventy-one thousand, nine hundred eighty-one".