1540101481 has 4 divisors (see below), whose sum is σ = 1542357072. Its totient is φ = 1537845892.

The previous prime is 1540101473. The next prime is 1540101509. The reversal of 1540101481 is 1841010451.

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 1540101481 - 2³ = 1540101473 is a prime.

It is a super-2 number, since 2×1540101481² = 4743825143556786722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540101581) 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, 1126771 + ... + 1128136.

It is an arithmetic number, because the mean of its divisors is an integer number (385589268).

Almost surely, 2^1540101481 is an apocalyptic number.

It is an amenable number.

1540101481 is a deficient number, since it is larger than the sum of its proper divisors (2255591).

1540101481 is an equidigital number, since it uses as much as digits as its factorization.

1540101481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255590.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1540101481 is about 39244.1267070628. The cubic root of 1540101481 is about 1154.8257155990.

The spelling of 1540101481 in words is "one billion, five hundred forty million, one hundred one thousand, four hundred eighty-one".