1540340143431 has 8 divisors (see below), whose sum is σ = 2103879220464. Its totient is φ = 1001847247680.

The previous prime is 1540340143417. The next prime is 1540340143487. The reversal of 1540340143431 is 1343410430451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1540340143431 - 2¹³ = 1540340135239 is a prime.

It is a super-2 number, since 2×1540340143431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1540340143392 and 1540340143401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540340143231) 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, 6261545176 + ... + 6261545421.

It is an arithmetic number, because the mean of its divisors is an integer number (262984902558).

Almost surely, 2^{1540340143431} is an apocalyptic number.

1540340143431 is a deficient number, since it is larger than the sum of its proper divisors (563539077033).

1540340143431 is a wasteful number, since it uses less digits than its factorization.

1540340143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12523090641.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 1540340143431 its reverse (1343410430451), we get a palindrome (2883750573882).

The spelling of 1540340143431 in words is "one trillion, five hundred forty billion, three hundred forty million, one hundred forty-three thousand, four hundred thirty-one".