197540531 has 8 divisors (see below), whose sum is σ = 200680704. Its totient is φ = 194410440.

The previous prime is 197540477. The next prime is 197540543. The reversal of 197540531 is 135045791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197540531 is a prime.

It is a super-2 number, since 2×197540531² = 78044522775523922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197540491 and 197540500.

It is not an unprimeable number, because it can be changed into a prime (197540831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43490 + ... + 47816.

It is an arithmetic number, because the mean of its divisors is an integer number (25085088).

Almost surely, 2^197540531 is an apocalyptic number.

197540531 is a deficient number, since it is larger than the sum of its proper divisors (3140173).

197540531 is an equidigital number, since it uses as much as digits as its factorization.

197540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 197540531 is about 14054.9112768455. The cubic root of 197540531 is about 582.3964766569.

The spelling of 197540531 in words is "one hundred ninety-seven million, five hundred forty thousand, five hundred thirty-one".