10521491951 has 2 divisors, whose sum is σ = 10521491952. Its totient is φ = 10521491950.

The previous prime is 10521491881. The next prime is 10521491969. The reversal of 10521491951 is 15919412501.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15919412501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10521491951 - 2²² = 10517297647 is a prime.

It is a super-2 number, since 2×10521491951² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10521491251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260745975 + 5260745976.

It is an arithmetic number, because the mean of its divisors is an integer number (5260745976).

Almost surely, 2^10521491951 is an apocalyptic number.

10521491951 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521491951 is an equidigital number, since it uses as much as digits as its factorization.

10521491951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 38.

The spelling of 10521491951 in words is "ten billion, five hundred twenty-one million, four hundred ninety-one thousand, nine hundred fifty-one".