31785053 has 4 divisors (see below), whose sum is σ = 33654780. Its totient is φ = 29915328.

The previous prime is 31785037. The next prime is 31785071. The reversal of 31785053 is 35058713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35058713 = 61 ⋅574733.

It can be written as a sum of positive squares in 2 ways, for example, as 17322244 + 14462809 = 4162^2 + 3803^2 .

It is a cyclic number.

It is not a de Polignac number, because 31785053 - 2⁴ = 31785037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31785253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934838 + ... + 934871.

It is an arithmetic number, because the mean of its divisors is an integer number (8413695).

Almost surely, 2^31785053 is an apocalyptic number.

It is an amenable number.

31785053 is a deficient number, since it is larger than the sum of its proper divisors (1869727).

31785053 is a wasteful number, since it uses less digits than its factorization.

31785053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869726.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 31785053 is about 5637.8234275295. The cubic root of 31785053 is about 316.7677647040.

The spelling of 31785053 in words is "thirty-one million, seven hundred eighty-five thousand, fifty-three".