10521388 has 12 divisors (see below), whose sum is σ = 18447912. Its totient is φ = 5250560.

The previous prime is 10521377. The next prime is 10521437. The reversal of 10521388 is 88312501.

It is a super-2 number, since 2×10521388² = 221399210893088, which contains 22 as substring.

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, 108 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (1537326).

Almost surely, 2^10521388 is an apocalyptic number.

It is an amenable number.

10521388 is a deficient number, since it is larger than the sum of its proper divisors (7926524).

10521388 is a wasteful number, since it uses less digits than its factorization.

10521388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072 (or 5070 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 10521388 is about 3243.6689103544. The cubic root of 10521388 is about 219.1245373553.

Adding to 10521388 its reverse (88312501), we get a palindrome (98833889).

The spelling of 10521388 in words is "ten million, five hundred twenty-one thousand, three hundred eighty-eight".