31245200220244 has 48 divisors (see below), whose sum is σ = 60434611453440. Its totient is φ = 14069433185280.

The previous prime is 31245200220173. The next prime is 31245200220253. The reversal of 31245200220244 is 44202200254213.

It is a happy number.

It is a super-2 number, since 2×31245200220244² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent 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, 83083182 + ... + 83458405.

It is an arithmetic number, because the mean of its divisors is an integer number (1259054405280).

Almost surely, 2^{31245200220244} is an apocalyptic number.

31245200220244 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31245200220244 is a deficient number, since it is larger than the sum of its proper divisors (29189411233196).

31245200220244 is a wasteful number, since it uses less digits than its factorization.

31245200220244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166541728 (or 166541726 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 31245200220244 its reverse (44202200254213), we get a palindrome (75447400474457).

The spelling of 31245200220244 in words is "thirty-one trillion, two hundred forty-five billion, two hundred million, two hundred twenty thousand, two hundred forty-four".