31520051342 has 16 divisors (see below), whose sum is σ = 50921680320. Its totient is φ = 14546380512.

The previous prime is 31520051341. The next prime is 31520051357. The reversal of 31520051342 is 24315002513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31520051341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268688 + ... + 367740.

It is an arithmetic number, because the mean of its divisors is an integer number (3182605020).

Almost surely, 2^31520051342 is an apocalyptic number.

31520051342 is a deficient number, since it is larger than the sum of its proper divisors (19401628978).

31520051342 is a wasteful number, since it uses less digits than its factorization.

31520051342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111307.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 31520051342 its reverse (24315002513), we get a palindrome (55835053855).

The spelling of 31520051342 in words is "thirty-one billion, five hundred twenty million, fifty-one thousand, three hundred forty-two".