31402127338 has 4 divisors (see below), whose sum is σ = 47103191010. Its totient is φ = 15701063668.

The previous prime is 31402127329. The next prime is 31402127363. The reversal of 31402127338 is 83372120413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83372120413 = 389 ⋅214324217.

It can be written as a sum of positive squares in only one way, i.e., 28922784489 + 2479342849 = 170067^2 + 49793^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850531833 + ... + 7850531836.

Almost surely, 2^31402127338 is an apocalyptic number.

31402127338 is a deficient number, since it is larger than the sum of its proper divisors (15701063672).

31402127338 is a wasteful number, since it uses less digits than its factorization.

31402127338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701063671.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 31402127338 in words is "thirty-one billion, four hundred two million, one hundred twenty-seven thousand, three hundred thirty-eight".