537188421 has 32 divisors (see below), whose sum is σ = 911232000. Its totient is φ = 279053040.

The previous prime is 537188417. The next prime is 537188453. The reversal of 537188421 is 124881735.

It is not a de Polignac number, because 537188421 - 2² = 537188417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 537188421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537188221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12411 + ... + 35048.

It is an arithmetic number, because the mean of its divisors is an integer number (28476000).

Almost surely, 2^537188421 is an apocalyptic number.

It is an amenable number.

537188421 is a deficient number, since it is larger than the sum of its proper divisors (374043579).

537188421 is a wasteful number, since it uses less digits than its factorization.

537188421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47494 (or 47480 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 537188421 is about 23177.3255791086. The cubic root of 537188421 is about 812.9095288067.

The spelling of 537188421 in words is "five hundred thirty-seven million, one hundred eighty-eight thousand, four hundred twenty-one".