31402442 has 8 divisors (see below), whose sum is σ = 48623232. Its totient is φ = 15194700.

The previous prime is 31402409. The next prime is 31402471. The reversal of 31402442 is 24420413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31402442² = 1972226727126728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253184 + ... + 253307.

It is an arithmetic number, because the mean of its divisors is an integer number (6077904).

Almost surely, 2^31402442 is an apocalyptic number.

31402442 is a deficient number, since it is larger than the sum of its proper divisors (17220790).

31402442 is a wasteful number, since it uses less digits than its factorization.

31402442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506524.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 31402442 is about 5603.7881830062. The cubic root of 31402442 is about 315.4916049313.

Adding to 31402442 its reverse (24420413), we get a palindrome (55822855).

The spelling of 31402442 in words is "thirty-one million, four hundred two thousand, four hundred forty-two".