997083206531 has 4 divisors (see below), whose sum is σ = 997089167592. Its totient is φ = 997077245472.

The previous prime is 997083206513. The next prime is 997083206533. The reversal of 997083206531 is 135602380799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135602380799 = 156971 ⋅863869.

It is a cyclic number.

It is not a de Polignac number, because 997083206531 - 2¹⁰ = 997083205507 is a prime.

It is a super-2 number, since 2×997083206531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997083206533) 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, 2722166 + ... + 3066651.

It is an arithmetic number, because the mean of its divisors is an integer number (249272291898).

Almost surely, 2^997083206531 is an apocalyptic number.

997083206531 is a deficient number, since it is larger than the sum of its proper divisors (5961061).

997083206531 is a wasteful number, since it uses less digits than its factorization.

997083206531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961060.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 997083206531 in words is "nine hundred ninety-seven billion, eighty-three million, two hundred six thousand, five hundred thirty-one".