373043521 has 4 divisors (see below), whose sum is σ = 380082132. Its totient is φ = 366004912.

The previous prime is 373043497. The next prime is 373043527. The reversal of 373043521 is 125340373.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125340373 = 79 ⋅1586587.

It can be written as a sum of positive squares in 2 ways, for example, as 283551921 + 89491600 = 16839^2 + 9460^2 .

It is a cyclic number.

It is not a de Polignac number, because 373043521 - 2⁹ = 373043009 is a prime.

It is a super-2 number, since 2×373043521² = 278322937120154882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 373043521.

It is not an unprimeable number, because it can be changed into a prime (373043527) 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, 3519226 + ... + 3519331.

It is an arithmetic number, because the mean of its divisors is an integer number (95020533).

Almost surely, 2^373043521 is an apocalyptic number.

It is an amenable number.

373043521 is a deficient number, since it is larger than the sum of its proper divisors (7038611).

373043521 is an equidigital number, since it uses as much as digits as its factorization.

373043521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038610.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 373043521 is about 19314.3345989449. The cubic root of 373043521 is about 719.8684951442.

Adding to 373043521 its reverse (125340373), we get a palindrome (498383894).

The spelling of 373043521 in words is "three hundred seventy-three million, forty-three thousand, five hundred twenty-one".