10521005507 has 4 divisors (see below), whose sum is σ = 10744856736. Its totient is φ = 10297154280.

The previous prime is 10521005431. The next prime is 10521005519. The reversal of 10521005507 is 70550012501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70550012501 = 42667 ⋅1653503.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10521005507 is a prime.

It is a super-2 number, since 2×10521005507² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10521005597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111925544 + ... + 111925637.

It is an arithmetic number, because the mean of its divisors is an integer number (2686214184).

Almost surely, 2^10521005507 is an apocalyptic number.

10521005507 is a deficient number, since it is larger than the sum of its proper divisors (223851229).

10521005507 is an equidigital number, since it uses as much as digits as its factorization.

10521005507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223851228.

The product of its (nonzero) digits is 1750, while the sum is 26.

The spelling of 10521005507 in words is "ten billion, five hundred twenty-one million, five thousand, five hundred seven".