31420452 has 48 divisors (see below), whose sum is σ = 88202240. Its totient is φ = 8504352.

The previous prime is 31420447. The next prime is 31420457. The reversal of 31420452 is 25402413.

It is an interprime number because it is at equal distance from previous prime (31420447) and next prime (31420457).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31420457) by changing a digit.

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, 8248 + ... + 11439.

Almost surely, 2^31420452 is an apocalyptic number.

It is an amenable number.

31420452 is an abundant number, since it is smaller than the sum of its proper divisors (56781788).

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

31420452 is a wasteful number, since it uses less digits than its factorization.

31420452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19720 (or 19718 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 31420452 is about 5605.3949013428. The cubic root of 31420452 is about 315.5519072256.

Adding to 31420452 its reverse (25402413), we get a palindrome (56822865).

It can be divided in two parts, 3 and 1420452, that added together give a triangular number (1420455 = T₁₆₈₅).

The spelling of 31420452 in words is "thirty-one million, four hundred twenty thousand, four hundred fifty-two".