36431021 has 4 divisors (see below), whose sum is σ = 39742944. Its totient is φ = 33119100.

The previous prime is 36430973. The next prime is 36431027. The reversal of 36431021 is 12013463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36431021 - 2⁶ = 36430957 is a prime.

It is a super-2 number, since 2×36431021² = 2654438582204882, 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 = 36430984 and 36431002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36431027) 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, 1655945 + ... + 1655966.

It is an arithmetic number, because the mean of its divisors is an integer number (9935736).

Almost surely, 2^36431021 is an apocalyptic number.

It is an amenable number.

36431021 is a deficient number, since it is larger than the sum of its proper divisors (3311923).

36431021 is a wasteful number, since it uses less digits than its factorization.

36431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311922.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 36431021 is about 6035.8115444404. The cubic root of 36431021 is about 331.5052781923.

Adding to 36431021 its reverse (12013463), we get a palindrome (48444484).

It can be divided in two parts, 3643 and 1021, that added together give a palindrome (4664).

The spelling of 36431021 in words is "thirty-six million, four hundred thirty-one thousand, twenty-one".