31005400342250 has 32 divisors (see below), whose sum is σ = 58043713148928. Its totient is φ = 12401817464400.

The previous prime is 31005400342249. The next prime is 31005400342283. The reversal of 31005400342250 is 5224300450013.

It is a happy number.

It is a super-2 number, since 2×31005400342250² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7450679 + ... + 10840821.

It is an arithmetic number, because the mean of its divisors is an integer number (1813866035904).

Almost surely, 2^{31005400342250} is an apocalyptic number.

31005400342250 is a deficient number, since it is larger than the sum of its proper divisors (27038312806678).

31005400342250 is a wasteful number, since it uses less digits than its factorization.

31005400342250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426743 (or 3426733 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 31005400342250 its reverse (5224300450013), we get a palindrome (36229700792263).

The spelling of 31005400342250 in words is "thirty-one trillion, five billion, four hundred million, three hundred forty-two thousand, two hundred fifty".