73135431 has 24 divisors (see below), whose sum is σ = 110545344. Its totient is φ = 46544640.

The previous prime is 73135399. The next prime is 73135441. The reversal of 73135431 is 13453137.

It is not a de Polignac number, because 73135431 - 2⁵ = 73135399 is a prime.

It is a super-2 number, since 2×73135431² = 10697582535111522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73135395 and 73135404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73135441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15235 + ... + 19451.

It is an arithmetic number, because the mean of its divisors is an integer number (4606056).

Almost surely, 2^73135431 is an apocalyptic number.

73135431 is a deficient number, since it is larger than the sum of its proper divisors (37409913).

73135431 is a wasteful number, since it uses less digits than its factorization.

73135431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311 (or 4308 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 73135431 is about 8551.9255726415. The cubic root of 73135431 is about 418.1922129813.

Adding to 73135431 its reverse (13453137), we get a palindrome (86588568).

The spelling of 73135431 in words is "seventy-three million, one hundred thirty-five thousand, four hundred thirty-one".