36521631 has 24 divisors (see below), whose sum is σ = 56582960. Its totient is φ = 23280048.

The previous prime is 36521623. The next prime is 36521651. The reversal of 36521631 is 13612563.

36521631 is a `hidden beast` number, since 3 + 6 + 5 + 21 + 631 = 666.

It is not a de Polignac number, because 36521631 - 2³ = 36521623 is a prime.

It is a super-3 number, since 3×36521631³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36521595 and 36521604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36521651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13005 + ... + 15561.

Almost surely, 2^36521631 is an apocalyptic number.

36521631 is a deficient number, since it is larger than the sum of its proper divisors (20061329).

36521631 is a wasteful number, since it uses less digits than its factorization.

36521631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612 (or 2583 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 36521631 is about 6043.3129159427. The cubic root of 36521631 is about 331.7798868809.

The spelling of 36521631 in words is "thirty-six million, five hundred twenty-one thousand, six hundred thirty-one".