31448972165 has 8 divisors (see below), whose sum is σ = 40641748728. Its totient is φ = 23223856320.

The previous prime is 31448972131. The next prime is 31448972173. The reversal of 31448972165 is 56127984413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77123524 + 31371848641 = 8782^2 + 177121^2 .

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

It is not a de Polignac number, because 31448972165 - 2¹² = 31448968069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241915106 + ... + 241915235.

It is an arithmetic number, because the mean of its divisors is an integer number (5080218591).

Almost surely, 2^31448972165 is an apocalyptic number.

It is an amenable number.

31448972165 is a deficient number, since it is larger than the sum of its proper divisors (9192776563).

31448972165 is a wasteful number, since it uses less digits than its factorization.

31448972165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483830359.

The product of its digits is 1451520, while the sum is 50.

The spelling of 31448972165 in words is "thirty-one billion, four hundred forty-eight million, nine hundred seventy-two thousand, one hundred sixty-five".