997524242 has 24 divisors (see below), whose sum is σ = 1771197708. Its totient is φ = 418540320.

The previous prime is 997524163. The next prime is 997524251. The reversal of 997524242 is 242425799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 969761881 + 27762361 = 31141^2 + 5269^2 .

It is a super-2 number, since 2×997524242² = 1990109226755349128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 997524193 and 997524202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155393 + ... + 161684.

Almost surely, 2^997524242 is an apocalyptic number.

997524242 is a deficient number, since it is larger than the sum of its proper divisors (773673466).

997524242 is a wasteful number, since it uses less digits than its factorization.

997524242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317114 (or 317103 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 997524242 is about 31583.6071720758. The cubic root of 997524242 is about 999.1740653531.

The spelling of 997524242 in words is "nine hundred ninety-seven million, five hundred twenty-four thousand, two hundred forty-two".