31440423123351 has 36 divisors (see below), whose sum is σ = 49920545265864. Its totient is φ = 19053756548640.

The previous prime is 31440423123323. The next prime is 31440423123359. The reversal of 31440423123351 is 15332132404413.

31440423123351 is a `hidden beast` number, since 3 + 1 + 4 + 4 + 0 + 4 + 2 + 312 + 335 + 1 = 666.

It is not a de Polignac number, because 31440423123351 - 2¹³ = 31440423115159 is a prime.

It is a super-2 number, since 2×31440423123351² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440423123359) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19301721 + ... + 20867133.

Almost surely, 2^{31440423123351} is an apocalyptic number.

31440423123351 is a deficient number, since it is larger than the sum of its proper divisors (18480122142513).

31440423123351 is a wasteful number, since it uses less digits than its factorization.

31440423123351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583884 (or 1583870 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 31440423123351 its reverse (15332132404413), we get a palindrome (46772555527764).

The spelling of 31440423123351 in words is "thirty-one trillion, four hundred forty billion, four hundred twenty-three million, one hundred twenty-three thousand, three hundred fifty-one".