31780053 has 32 divisors (see below), whose sum is σ = 49786880. Its totient is φ = 20003760.

The previous prime is 31780033. The next prime is 31780057. The reversal of 31780053 is 35008713.

It is not a de Polignac number, because 31780053 - 2⁹ = 31779541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31779999 and 31780026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31780057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35550 + ... + 36432.

It is an arithmetic number, because the mean of its divisors is an integer number (1555840).

Almost surely, 2^31780053 is an apocalyptic number.

It is an amenable number.

31780053 is a deficient number, since it is larger than the sum of its proper divisors (18006827).

31780053 is a wasteful number, since it uses less digits than its factorization.

31780053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 31780053 is about 5637.3799765494. The cubic root of 31780053 is about 316.7511539417.

Adding to 31780053 its reverse (35008713), we get a palindrome (66788766).

The spelling of 31780053 in words is "thirty-one million, seven hundred eighty thousand, fifty-three".