10506221252 has 6 divisors (see below), whose sum is σ = 18385887198. Its totient is φ = 5253110624.

The previous prime is 10506221207. The next prime is 10506221263. The reversal of 10506221252 is 25212260501.

It can be written as a sum of positive squares in only one way, i.e., 10505020036 + 1201216 = 102494^2 + 1096^2 .

It is a super-2 number, since 2×10506221252² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313277653 + ... + 1313277660.

It is an arithmetic number, because the mean of its divisors is an integer number (3064314533).

Almost surely, 2^10506221252 is an apocalyptic number.

It is an amenable number.

10506221252 is a deficient number, since it is larger than the sum of its proper divisors (7879665946).

10506221252 is a wasteful number, since it uses less digits than its factorization.

10506221252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626555317 (or 2626555315 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 10506221252 its reverse (25212260501), we get a palindrome (35718481753).

The spelling of 10506221252 in words is "ten billion, five hundred six million, two hundred twenty-one thousand, two hundred fifty-two".