3550421309 has 4 divisors (see below), whose sum is σ = 3672849660. Its totient is φ = 3427992960.

The previous prime is 3550421269. The next prime is 3550421353. The reversal of 3550421309 is 9031240553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9031240553 = 821 ⋅11000293.

It can be written as a sum of positive squares in 2 ways, for example, as 2953596409 + 596824900 = 54347^2 + 24430^2 .

It is a cyclic number.

It is not a de Polignac number, because 3550421309 - 2²⁰ = 3549372733 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 (3550421509) 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, 61214132 + ... + 61214189.

It is an arithmetic number, because the mean of its divisors is an integer number (918212415).

Almost surely, 2^3550421309 is an apocalyptic number.

It is an amenable number.

3550421309 is a deficient number, since it is larger than the sum of its proper divisors (122428351).

3550421309 is a wasteful number, since it uses less digits than its factorization.

3550421309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122428350.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 3550421309 is about 59585.4118807616. The cubic root of 3550421309 is about 1525.5506471933.

The spelling of 3550421309 in words is "three billion, five hundred fifty million, four hundred twenty-one thousand, three hundred nine".