33621413 has 4 divisors (see below), whose sum is σ = 38424480. Its totient is φ = 28818348.

The previous prime is 33621409. The next prime is 33621437. The reversal of 33621413 is 31412633.

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: 31412633 = 7 ⋅4487519.

It is a cyclic number.

It is not a de Polignac number, because 33621413 - 2² = 33621409 is a prime.

It is a super-2 number, since 2×33621413² = 2260798824233138, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33621473) 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, 2401523 + ... + 2401536.

It is an arithmetic number, because the mean of its divisors is an integer number (9606120).

Almost surely, 2^33621413 is an apocalyptic number.

It is an amenable number.

33621413 is a deficient number, since it is larger than the sum of its proper divisors (4803067).

33621413 is an equidigital number, since it uses as much as digits as its factorization.

33621413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803066.

The product of its digits is 1296, while the sum is 23.

The square root of 33621413 is about 5798.3974510204. The cubic root of 33621413 is about 322.7542629570.

The spelling of 33621413 in words is "thirty-three million, six hundred twenty-one thousand, four hundred thirteen".