531641397 has 16 divisors (see below), whose sum is σ = 821532672. Its totient is φ = 299515440.

The previous prime is 531641381. The next prime is 531641423. The reversal of 531641397 is 793146135.

It is not a de Polignac number, because 531641397 - 2⁴ = 531641381 is a prime.

It is a super-3 number, since 3×531641397³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531641317) 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, 176793 + ... + 179774.

It is an arithmetic number, because the mean of its divisors is an integer number (51345792).

Almost surely, 2^531641397 is an apocalyptic number.

It is an amenable number.

531641397 is a deficient number, since it is larger than the sum of its proper divisors (289891275).

531641397 is a wasteful number, since it uses less digits than its factorization.

531641397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356648.

The product of its digits is 68040, while the sum is 39.

The square root of 531641397 is about 23057.3501729926. The cubic root of 531641397 is about 810.1017994292.

The spelling of 531641397 in words is "five hundred thirty-one million, six hundred forty-one thousand, three hundred ninety-seven".