31428601731 has 6 divisors (see below), whose sum is σ = 45396869180. Its totient is φ = 20952401148.

The previous prime is 31428601717. The next prime is 31428601733. The reversal of 31428601731 is 13710682413.

It is a happy number.

31428601731 is a `hidden beast` number, since 3 + 1 + 42 + 8 + 601 + 7 + 3 + 1 = 666.

It is not a de Polignac number, because 31428601731 - 2²⁹ = 30891730819 is a prime.

It is a super-2 number, since 2×31428601731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31428601733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1746033421 + ... + 1746033438.

Almost surely, 2^31428601731 is an apocalyptic number.

31428601731 is a deficient number, since it is larger than the sum of its proper divisors (13968267449).

31428601731 is a wasteful number, since it uses less digits than its factorization.

31428601731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492066865 (or 3492066862 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 31428601731 in words is "thirty-one billion, four hundred twenty-eight million, six hundred one thousand, seven hundred thirty-one".