53431431 has 8 divisors (see below), whose sum is σ = 71284080. Its totient is φ = 35599872.

The previous prime is 53431429. The next prime is 53431447. The reversal of 53431431 is 13413435.

It is a happy number.

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

It is not a de Polignac number, because 53431431 - 2¹ = 53431429 is a prime.

It is a super-3 number, since 3×53431431³ (a number of 24 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 (53431421) 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, 2125 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (8910510).

Almost surely, 2^53431431 is an apocalyptic number.

53431431 is a deficient number, since it is larger than the sum of its proper divisors (17852649).

53431431 is a wasteful number, since it uses less digits than its factorization.

53431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10545.

The product of its digits is 2160, while the sum is 24.

The square root of 53431431 is about 7309.6806359786. The cubic root of 53431431 is about 376.6450537977.

Adding to 53431431 its reverse (13413435), we get a palindrome (66844866).

The spelling of 53431431 in words is "fifty-three million, four hundred thirty-one thousand, four hundred thirty-one".