38211421 has 4 divisors (see below), whose sum is σ = 38234592. Its totient is φ = 38188252.

The previous prime is 38211389. The next prime is 38211449. The reversal of 38211421 is 12411283.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12411283 = 23 ⋅539621.

It is a cyclic number.

It is not a de Polignac number, because 38211421 - 2⁵ = 38211389 is a prime.

It is a super-2 number, since 2×38211421² = 2920225389678482, 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 = 38211392 and 38211401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38241421) 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, 8905 + ... + 12478.

It is an arithmetic number, because the mean of its divisors is an integer number (9558648).

Almost surely, 2^38211421 is an apocalyptic number.

It is an amenable number.

38211421 is a deficient number, since it is larger than the sum of its proper divisors (23171).

38211421 is a wasteful number, since it uses less digits than its factorization.

38211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23170.

The product of its digits is 384, while the sum is 22.

The square root of 38211421 is about 6181.5387242983. The cubic root of 38211421 is about 336.8198898448.

The spelling of 38211421 in words is "thirty-eight million, two hundred eleven thousand, four hundred twenty-one".