31617071421 has 8 divisors (see below), whose sum is σ = 45398871840. Its totient is φ = 19456659312.

The previous prime is 31617071413. The next prime is 31617071441. The reversal of 31617071421 is 12417071613.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31617071421 - 2³ = 31617071413 is a prime.

It is a super-2 number, since 2×31617071421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31617071441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405347031 + ... + 405347108.

It is an arithmetic number, because the mean of its divisors is an integer number (5674858980).

Almost surely, 2^31617071421 is an apocalyptic number.

It is an amenable number.

31617071421 is a deficient number, since it is larger than the sum of its proper divisors (13781800419).

31617071421 is a wasteful number, since it uses less digits than its factorization.

31617071421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810694155.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 31617071421 in words is "thirty-one billion, six hundred seventeen million, seventy-one thousand, four hundred twenty-one".