431987421307 has 16 divisors (see below), whose sum is σ = 477918646240. Its totient is φ = 387876460032.

The previous prime is 431987421287. The next prime is 431987421323. The reversal of 431987421307 is 703124789134.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431987421307 is a prime.

It is a super-2 number, since 2×431987421307² (a number of 24 digits) contains 22 as substring.

It is the 657258-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431987481307) by changing a digit.

It is a nontrivial repunit in base 657257.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1706044 + ... + 1942822.

It is an arithmetic number, because the mean of its divisors is an integer number (29869915390).

Almost surely, 2^431987421307 is an apocalyptic number.

431987421307 is a deficient number, since it is larger than the sum of its proper divisors (45931224933).

431987421307 is a wasteful number, since it uses less digits than its factorization.

431987421307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240622.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 431987421307 in words is "four hundred thirty-one billion, nine hundred eighty-seven million, four hundred twenty-one thousand, three hundred seven".