331001002 has 4 divisors (see below), whose sum is σ = 496501506. Its totient is φ = 165500500.

The previous prime is 331000973. The next prime is 331001081. The reversal of 331001002 is 200100133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200100133 = 31 ⋅6454843.

It can be written as a sum of positive squares in only one way, i.e., 321520761 + 9480241 = 17931^2 + 3079^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 331001002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750249 + ... + 82750252.

Almost surely, 2^331001002 is an apocalyptic number.

331001002 is a deficient number, since it is larger than the sum of its proper divisors (165500504).

331001002 is a wasteful number, since it uses less digits than its factorization.

331001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165500503.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 331001002 is about 18193.4329360899. The cubic root of 331001002 is about 691.7403396694.

Adding to 331001002 its reverse (200100133), we get a palindrome (531101135).

The spelling of 331001002 in words is "three hundred thirty-one million, one thousand, two".