971253210511 has 4 divisors (see below), whose sum is σ = 1013481610992. Its totient is φ = 929024810032.

The previous prime is 971253210503. The next prime is 971253210533. The reversal of 971253210511 is 115012352179.

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

It is a cyclic number.

It is not a de Polignac number, because 971253210511 - 2³ = 971253210503 is a prime.

It is a super-2 number, since 2×971253210511² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971253240511) 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, 21114200206 + ... + 21114200251.

It is an arithmetic number, because the mean of its divisors is an integer number (253370402748).

Almost surely, 2^971253210511 is an apocalyptic number.

971253210511 is a deficient number, since it is larger than the sum of its proper divisors (42228400481).

971253210511 is a wasteful number, since it uses less digits than its factorization.

971253210511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42228400480.

The product of its (nonzero) digits is 18900, while the sum is 37.

The spelling of 971253210511 in words is "nine hundred seventy-one billion, two hundred fifty-three million, two hundred ten thousand, five hundred eleven".