354312521 has 4 divisors (see below), whose sum is σ = 375154452. Its totient is φ = 333470592.

The previous prime is 354312509. The next prime is 354312559. The reversal of 354312521 is 125213453.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125213453 = 401 ⋅312253.

It can be written as a sum of positive squares in 2 ways, for example, as 316662025 + 37650496 = 17795^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 354312521 - 2¹⁰ = 354311497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354312571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10420940 + ... + 10420973.

It is an arithmetic number, because the mean of its divisors is an integer number (93788613).

Almost surely, 2^354312521 is an apocalyptic number.

It is an amenable number.

354312521 is a deficient number, since it is larger than the sum of its proper divisors (20841931).

354312521 is a wasteful number, since it uses less digits than its factorization.

354312521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20841930.

The product of its digits is 3600, while the sum is 26.

The square root of 354312521 is about 18823.1910419036. The cubic root of 354312521 is about 707.6125063418.

Adding to 354312521 its reverse (125213453), we get a palindrome (479525974).

The spelling of 354312521 in words is "three hundred fifty-four million, three hundred twelve thousand, five hundred twenty-one".