1540215221041 has 4 divisors (see below), whose sum is σ = 1760245966912. Its totient is φ = 1320184475172.

The previous prime is 1540215220997. The next prime is 1540215221087. The reversal of 1540215221041 is 1401225120451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1540215221041 - 2²⁵ = 1540181666609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540215251041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110015372925 + ... + 110015372938.

It is an arithmetic number, because the mean of its divisors is an integer number (440061491728).

Almost surely, 2^{1540215221041} is an apocalyptic number.

It is an amenable number.

1540215221041 is a deficient number, since it is larger than the sum of its proper divisors (220030745871).

1540215221041 is an equidigital number, since it uses as much as digits as its factorization.

1540215221041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220030745870.

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 1540215221041 in words is "one trillion, five hundred forty billion, two hundred fifteen million, two hundred twenty-one thousand, forty-one".