37216421 has 8 divisors (see below), whose sum is σ = 42736800. Its totient is φ = 32052240.

The previous prime is 37216411. The next prime is 37216447. The reversal of 37216421 is 12461273.

37216421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 37216421 - 2²² = 33022117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37216411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88826 + ... + 89243.

It is an arithmetic number, because the mean of its divisors is an integer number (5342100).

Almost surely, 2^37216421 is an apocalyptic number.

It is an amenable number.

37216421 is a deficient number, since it is larger than the sum of its proper divisors (5520379).

37216421 is a wasteful number, since it uses less digits than its factorization.

37216421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178099.

The product of its digits is 2016, while the sum is 26.

The square root of 37216421 is about 6100.5262887721. The cubic root of 37216421 is about 333.8706187301.

Adding to 37216421 its reverse (12461273), we get a palindrome (49677694).

The spelling of 37216421 in words is "thirty-seven million, two hundred sixteen thousand, four hundred twenty-one".