31284667057 has 12 divisors (see below), whose sum is σ = 36801275940. Its totient is φ = 26514128256.

The previous prime is 31284667039. The next prime is 31284667081. The reversal of 31284667057 is 75076648213.

It can be written as a sum of positive squares in 2 ways, for example, as 20057357376 + 11227309681 = 141624^2 + 105959^2 .

It is not a de Polignac number, because 31284667057 - 2⁷ = 31284666929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31284667057.

It is not an unprimeable number, because it can be changed into a prime (31284667087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3582508 + ... + 3591229.

It is an arithmetic number, because the mean of its divisors is an integer number (3066772995).

Almost surely, 2^31284667057 is an apocalyptic number.

It is an amenable number.

31284667057 is a deficient number, since it is larger than the sum of its proper divisors (5516608883).

31284667057 is an equidigital number, since it uses as much as digits as its factorization.

31284667057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7173840 (or 7173833 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 31284667057 in words is "thirty-one billion, two hundred eighty-four million, six hundred sixty-seven thousand, fifty-seven".