331623745 has 4 divisors (see below), whose sum is σ = 397948500. Its totient is φ = 265298992.

The previous prime is 331623727. The next prime is 331623763. The reversal of 331623745 is 547326133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547326133 = 6673 ⋅82021.

It is an interprime number because it is at equal distance from previous prime (331623727) and next prime (331623763).

It can be written as a sum of positive squares in 2 ways, for example, as 233356176 + 98267569 = 15276^2 + 9913^2 .

It is a cyclic number.

It is not a de Polignac number, because 331623745 - 2⁵ = 331623713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331623745.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33162370 + ... + 33162379.

It is an arithmetic number, because the mean of its divisors is an integer number (99487125).

Almost surely, 2^331623745 is an apocalyptic number.

It is an amenable number.

331623745 is a deficient number, since it is larger than the sum of its proper divisors (66324755).

331623745 is an equidigital number, since it uses as much as digits as its factorization.

331623745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66324754.

The product of its digits is 45360, while the sum is 34.

The square root of 331623745 is about 18210.5393934392. The cubic root of 331623745 is about 692.1738797297.

Adding to 331623745 its reverse (547326133), we get a palindrome (878949878).

The spelling of 331623745 in words is "three hundred thirty-one million, six hundred twenty-three thousand, seven hundred forty-five".