31451351630042 has 16 divisors (see below), whose sum is σ = 50814913284960. Its totient is φ = 14551543348272.

The previous prime is 31451351629993. The next prime is 31451351630059. The reversal of 31451351630042 is 24003615315413.

It is a super-3 number, since 3×31451351630042³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 31451351629978 and 31451351630005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9624034973 + ... + 9624038240.

It is an arithmetic number, because the mean of its divisors is an integer number (3175932080310).

Almost surely, 2^{31451351630042} is an apocalyptic number.

31451351630042 is a deficient number, since it is larger than the sum of its proper divisors (19363561654918).

31451351630042 is a wasteful number, since it uses less digits than its factorization.

31451351630042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19248073277.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 31451351630042 its reverse (24003615315413), we get a palindrome (55454966945455).

The spelling of 31451351630042 in words is "thirty-one trillion, four hundred fifty-one billion, three hundred fifty-one million, six hundred thirty thousand, forty-two".