3401555021 has 4 divisors (see below), whose sum is σ = 3401684412. Its totient is φ = 3401425632.

The previous prime is 3401554993. The next prime is 3401555023. The reversal of 3401555021 is 1205551043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1205551043 = 181 ⋅6660503.

It can be written as a sum of positive squares in 2 ways, for example, as 523768996 + 2877786025 = 22886^2 + 53645^2 .

It is a cyclic number.

It is not a de Polignac number, because 3401555021 - 2⁶ = 3401554957 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 (3401555023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9650 + ... + 83043.

It is an arithmetic number, because the mean of its divisors is an integer number (850421103).

Almost surely, 2^3401555021 is an apocalyptic number.

It is an amenable number.

3401555021 is a deficient number, since it is larger than the sum of its proper divisors (129391).

3401555021 is an equidigital number, since it uses as much as digits as its factorization.

3401555021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129390.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 3401555021 is about 58322.8516192410. The cubic root of 3401555021 is about 1503.9238040763.

The spelling of 3401555021 in words is "three billion, four hundred one million, five hundred fifty-five thousand, twenty-one".