1540131742221 has 8 divisors (see below), whose sum is σ = 2053538634144. Its totient is φ = 1026739672560.

The previous prime is 1540131742217. The next prime is 1540131742241. The reversal of 1540131742221 is 1222471310451.

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

It is not a de Polignac number, because 1540131742221 - 2² = 1540131742217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540131742241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3460806 + ... + 3880391.

It is an arithmetic number, because the mean of its divisors is an integer number (256692329268).

Almost surely, 2^{1540131742221} is an apocalyptic number.

It is an amenable number.

1540131742221 is a deficient number, since it is larger than the sum of its proper divisors (513406891923).

1540131742221 is an equidigital number, since it uses as much as digits as its factorization.

1540131742221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411131.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 1540131742221 in words is "one trillion, five hundred forty billion, one hundred thirty-one million, seven hundred forty-two thousand, two hundred twenty-one".