352251421 has 4 divisors (see below), whose sum is σ = 352298844. Its totient is φ = 352204000.

The previous prime is 352251401. The next prime is 352251439. The reversal of 352251421 is 124152253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124152253 = 5393 ⋅23021.

It can be written as a sum of positive squares in 2 ways, for example, as 241180900 + 111070521 = 15530^2 + 10539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-352251421 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 (352251401) 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, 9880 + ... + 28321.

It is an arithmetic number, because the mean of its divisors is an integer number (88074711).

Almost surely, 2^352251421 is an apocalyptic number.

It is an amenable number.

352251421 is a deficient number, since it is larger than the sum of its proper divisors (47423).

352251421 is an equidigital number, since it uses as much as digits as its factorization.

352251421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47422.

The product of its digits is 2400, while the sum is 25.

The square root of 352251421 is about 18768.3622354216. The cubic root of 352251421 is about 706.2377338199.

The spelling of 352251421 in words is "three hundred fifty-two million, two hundred fifty-one thousand, four hundred twenty-one".