997152211 has 16 divisors (see below), whose sum is σ = 1127253600. Its totient is φ = 873734400.

The previous prime is 997152181. The next prime is 997152239. The reversal of 997152211 is 112251799.

It is not a de Polignac number, because 997152211 - 2⁷ = 997152083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997152911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208495 + ... + 213223.

It is an arithmetic number, because the mean of its divisors is an integer number (70453350).

Almost surely, 2^997152211 is an apocalyptic number.

997152211 is a deficient number, since it is larger than the sum of its proper divisors (130101389).

997152211 is a wasteful number, since it uses less digits than its factorization.

997152211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430.

The product of its digits is 11340, while the sum is 37.

The square root of 997152211 is about 31577.7170010753. The cubic root of 997152211 is about 999.0498344714.

It can be divided in two parts, 99715 and 2211, that added together give a triangular number (101926 = T₄₅₁).

The spelling of 997152211 in words is "nine hundred ninety-seven million, one hundred fifty-two thousand, two hundred eleven".