31047420472 has 8 divisors (see below), whose sum is σ = 58213913400. Its totient is φ = 15523710232.

The previous prime is 31047420457. The next prime is 31047420473. The reversal of 31047420472 is 27402474013.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31047420473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940463772 + ... + 1940463787.

It is an arithmetic number, because the mean of its divisors is an integer number (7276739175).

Almost surely, 2^31047420472 is an apocalyptic number.

It is an amenable number.

31047420472 is a deficient number, since it is larger than the sum of its proper divisors (27166492928).

31047420472 is a wasteful number, since it uses less digits than its factorization.

31047420472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880927565 (or 3880927561 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

Adding to 31047420472 its reverse (27402474013), we get a palindrome (58449894485).

The spelling of 31047420472 in words is "thirty-one billion, forty-seven million, four hundred twenty thousand, four hundred seventy-two".