31511075342 has 16 divisors (see below), whose sum is σ = 49325455872. Its totient is φ = 15069361560.

The previous prime is 31511075329. The next prime is 31511075347. The reversal of 31511075342 is 24357011513.

It is a junction number, because it is equal to n+sod(n) for n = 31511075299 and 31511075308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31511075347) 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, 1137743 + ... + 1165109.

It is an arithmetic number, because the mean of its divisors is an integer number (3082840992).

Almost surely, 2^31511075342 is an apocalyptic number.

31511075342 is a deficient number, since it is larger than the sum of its proper divisors (17814380530).

31511075342 is a wasteful number, since it uses less digits than its factorization.

31511075342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52423.

The product of its (nonzero) digits is 12600, while the sum is 32.

Adding to 31511075342 its reverse (24357011513), we get a palindrome (55868086855).

The spelling of 31511075342 in words is "thirty-one billion, five hundred eleven million, seventy-five thousand, three hundred forty-two".