531451965 has 48 divisors (see below), whose sum is σ = 938448000. Its totient is φ = 256629120.

The previous prime is 531451957. The next prime is 531451967. The reversal of 531451965 is 569154135.

It is a happy number.

It is not a de Polignac number, because 531451965 - 2³ = 531451957 is a prime.

It is a super-2 number, since 2×531451965² = 564882382204722450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531451967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 633016 + ... + 633854.

It is an arithmetic number, because the mean of its divisors is an integer number (19551000).

Almost surely, 2^531451965 is an apocalyptic number.

531451965 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531451965 is a deficient number, since it is larger than the sum of its proper divisors (406996035).

531451965 is a wasteful number, since it uses less digits than its factorization.

531451965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1207 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 531451965 is about 23053.2419628997. The cubic root of 531451965 is about 810.0055707588.

The spelling of 531451965 in words is "five hundred thirty-one million, four hundred fifty-one thousand, nine hundred sixty-five".