31581053 has 24 divisors (see below), whose sum is σ = 39079872. Its totient is φ = 24989184.

The previous prime is 31581023. The next prime is 31581073. The reversal of 31581053 is 35018513.

It is not a de Polignac number, because 31581053 - 2¹² = 31576957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31581023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135425 + ... + 135657.

It is an arithmetic number, because the mean of its divisors is an integer number (1628328).

Almost surely, 2^31581053 is an apocalyptic number.

It is an amenable number.

31581053 is a deficient number, since it is larger than the sum of its proper divisors (7498819).

31581053 is a wasteful number, since it uses less digits than its factorization.

31581053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 31581053 is about 5619.7022163100. The cubic root of 31581053 is about 316.0886261321.

Adding to 31581053 its reverse (35018513), we get a palindrome (66599566).

The spelling of 31581053 in words is "thirty-one million, five hundred eighty-one thousand, fifty-three".