31428734137 has 16 divisors (see below), whose sum is σ = 33233276160. Its totient is φ = 29673376768.

The previous prime is 31428734111. The next prime is 31428734147. The reversal of 31428734137 is 73143782413.

It is a cyclic number.

It is not a de Polignac number, because 31428734137 - 2¹¹ = 31428732089 is a prime.

It is a super-3 number, since 3×31428734137³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31428734093 and 31428734102.

It is not an unprimeable number, because it can be changed into a prime (31428734147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1649298 + ... + 1668244.

It is an arithmetic number, because the mean of its divisors is an integer number (2077079760).

Almost surely, 2^31428734137 is an apocalyptic number.

It is an amenable number.

31428734137 is a deficient number, since it is larger than the sum of its proper divisors (1804542023).

31428734137 is a wasteful number, since it uses less digits than its factorization.

31428734137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20240.

The product of its digits is 338688, while the sum is 43.

The spelling of 31428734137 in words is "thirty-one billion, four hundred twenty-eight million, seven hundred thirty-four thousand, one hundred thirty-seven".