523121002 has 4 divisors (see below), whose sum is σ = 784681506. Its totient is φ = 261560500.

The previous prime is 523120999. The next prime is 523121023. The reversal of 523121002 is 200121325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 492440481 + 30680521 = 22191^2 + 5539^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130780249 + ... + 130780252.

Almost surely, 2^523121002 is an apocalyptic number.

523121002 is a deficient number, since it is larger than the sum of its proper divisors (261560504).

523121002 is a wasteful number, since it uses less digits than its factorization.

523121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261560503.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 523121002 is about 22871.8386230753. The cubic root of 523121002 is about 805.7507505724.

Adding to 523121002 its reverse (200121325), we get a palindrome (723242327).

The spelling of 523121002 in words is "five hundred twenty-three million, one hundred twenty-one thousand, two".