33991405141 has 4 divisors (see below), whose sum is σ = 33992942284. Its totient is φ = 33989868000.

The previous prime is 33991405139. The next prime is 33991405153. The reversal of 33991405141 is 14150419933.

33991405141 = T₁₅₀₅₃₄ + T₁₅₀₅₃₅ + T₁₅₀₅₃₆.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14150419933 = 13 ⋅1088493841.

It can be written as a sum of positive squares in 2 ways, for example, as 5448654225 + 28542750916 = 73815^2 + 168946^2 .

It is a 5-Lehmer number, since φ(33991405141) divides (33991405141-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 33991405141 - 2¹ = 33991405139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33991405094 and 33991405103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33991405111) 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, 734910 + ... + 779791.

It is an arithmetic number, because the mean of its divisors is an integer number (8498235571).

Almost surely, 2^33991405141 is an apocalyptic number.

33991405141 is the 150536-th centered triangular number.

It is an amenable number.

33991405141 is a deficient number, since it is larger than the sum of its proper divisors (1537143).

33991405141 is a wasteful number, since it uses less digits than its factorization.

33991405141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537142.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 33991405141 in words is "thirty-three billion, nine hundred ninety-one million, four hundred five thousand, one hundred forty-one".