31430452 has 6 divisors (see below), whose sum is σ = 55003298. Its totient is φ = 15715224.

The previous prime is 31430417. The next prime is 31430453. The reversal of 31430452 is 25403413.

It can be written as a sum of positive squares in only one way, i.e., 27604516 + 3825936 = 5254^2 + 1956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928803 + ... + 3928810.

Almost surely, 2^31430452 is an apocalyptic number.

It is an amenable number.

31430452 is a deficient number, since it is larger than the sum of its proper divisors (23572846).

31430452 is a wasteful number, since it uses less digits than its factorization.

31430452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857617 (or 7857615 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 31430452 is about 5606.2868281956. The cubic root of 31430452 is about 315.5853799498.

Adding to 31430452 its reverse (25403413), we get a palindrome (56833865).

The spelling of 31430452 in words is "thirty-one million, four hundred thirty thousand, four hundred fifty-two".