33555145 has 8 divisors (see below), whose sum is σ = 43363656. Its totient is φ = 24779136.

The previous prime is 33555131. The next prime is 33555149. The reversal of 33555145 is 54155533.

It can be written as a sum of positive squares in 4 ways, for example, as 3732624 + 29822521 = 1932^2 + 5461^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 33555145 - 2¹⁷ = 33424073 is a prime.

It is a super-2 number, since 2×33555145² = 2251895511942050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33555149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258052 + ... + 258181.

It is an arithmetic number, because the mean of its divisors is an integer number (5420457).

Almost surely, 2^33555145 is an apocalyptic number.

It is an amenable number.

33555145 is a deficient number, since it is larger than the sum of its proper divisors (9808511).

33555145 is a wasteful number, since it uses less digits than its factorization.

33555145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516251.

The product of its digits is 22500, while the sum is 31.

The square root of 33555145 is about 5792.6802949930. The cubic root of 33555145 is about 322.5420733122.

The spelling of 33555145 in words is "thirty-three million, five hundred fifty-five thousand, one hundred forty-five".