31130485 has 32 divisors (see below), whose sum is σ = 41718240. Its totient is φ = 22192128.

The previous prime is 31130461. The next prime is 31130507. The reversal of 31130485 is 58403113.

31130485 = T₈₁₃ + T₈₁₄ + ... + T₈₉₇.

It can be written as a sum of positive squares in 16 ways, for example, as 27556 + 31102929 = 166^2 + 5577^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130485 - 2⁵ = 31130453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179859 + ... + 180031.

It is an arithmetic number, because the mean of its divisors is an integer number (1303695).

Almost surely, 2^31130485 is an apocalyptic number.

It is an amenable number.

31130485 is a deficient number, since it is larger than the sum of its proper divisors (10587755).

31130485 is a wasteful number, since it uses less digits than its factorization.

31130485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 31130485 is about 5579.4699569045. The cubic root of 31130485 is about 314.5782042446.

Adding to 31130485 its reverse (58403113), we get a palindrome (89533598).

It can be divided in two parts, 311 and 30485, that multiplied together give a triangular number (9480835 = T₄₃₅₄).

The spelling of 31130485 in words is "thirty-one million, one hundred thirty thousand, four hundred eighty-five".