353542021 has 4 divisors (see below), whose sum is σ = 404048032. Its totient is φ = 303036012.

The previous prime is 353541997. The next prime is 353542061. The reversal of 353542021 is 120245353.

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.

It is a cyclic number.

It is not a de Polignac number, because 353542021 - 2⁹ = 353541509 is a prime.

It is a super-2 number, since 2×353542021² = 249983921225528882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353542061) 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, 25252995 + ... + 25253008.

It is an arithmetic number, because the mean of its divisors is an integer number (101012008).

Almost surely, 2^353542021 is an apocalyptic number.

It is an amenable number.

353542021 is a deficient number, since it is larger than the sum of its proper divisors (50506011).

353542021 is an equidigital number, since it uses as much as digits as its factorization.

353542021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50506010.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 353542021 is about 18802.7131286950. The cubic root of 353542021 is about 707.0992013764.

Adding to 353542021 its reverse (120245353), we get a palindrome (473787374).

The spelling of 353542021 in words is "three hundred fifty-three million, five hundred forty-two thousand, twenty-one".