31400530 has 32 divisors (see below), whose sum is σ = 68397696. Its totient is φ = 10132224.

The previous prime is 31400527. The next prime is 31400557. The reversal of 31400530 is 3500413.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12004 + ... + 14383.

It is an arithmetic number, because the mean of its divisors is an integer number (2137428).

Almost surely, 2^31400530 is an apocalyptic number.

31400530 is an abundant number, since it is smaller than the sum of its proper divisors (36997166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31400530 is a wasteful number, since it uses less digits than its factorization.

31400530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26418.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 31400530 is about 5603.6175815271. The cubic root of 31400530 is about 315.4852016905.

Adding to 31400530 its reverse (3500413), we get a palindrome (34900943).

The spelling of 31400530 in words is "thirty-one million, four hundred thousand, five hundred thirty".