31224400144142 has 4 divisors (see below), whose sum is σ = 46836600216216. Its totient is φ = 15612200072070.

The previous prime is 31224400144043. The next prime is 31224400144153. The reversal of 31224400144142 is 24144100442213.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31224400144142² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31224400144099 and 31224400144108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7806100036034 + ... + 7806100036037.

It is an arithmetic number, because the mean of its divisors is an integer number (11709150054054).

Almost surely, 2^{31224400144142} is an apocalyptic number.

31224400144142 is a deficient number, since it is larger than the sum of its proper divisors (15612200072074).

31224400144142 is a wasteful number, since it uses less digits than its factorization.

31224400144142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15612200072073.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 31224400144142 its reverse (24144100442213), we get a palindrome (55368500586355).

The spelling of 31224400144142 in words is "thirty-one trillion, two hundred twenty-four billion, four hundred million, one hundred forty-four thousand, one hundred forty-two".