31400240643026 has 4 divisors (see below), whose sum is σ = 47100360964542. Its totient is φ = 15700120321512.

The previous prime is 31400240642977. The next prime is 31400240643029. The reversal of 31400240643026 is 62034604200413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28060868157001 + 3339372486025 = 5297251^2 + 1827395^2 .

It is a super-2 number, since 2×31400240643026² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31400240643029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850060160755 + ... + 7850060160758.

Almost surely, 2^{31400240643026} is an apocalyptic number.

31400240643026 is a deficient number, since it is larger than the sum of its proper divisors (15700120321516).

31400240643026 is a wasteful number, since it uses less digits than its factorization.

31400240643026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15700120321515.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 31400240643026 its reverse (62034604200413), we get a palindrome (93434844843439).

The spelling of 31400240643026 in words is "thirty-one trillion, four hundred billion, two hundred forty million, six hundred forty-three thousand, twenty-six".