1540324157 has 8 divisors (see below), whose sum is σ = 1558507320. Its totient is φ = 1522160640.

The previous prime is 1540324081. The next prime is 1540324193. The reversal of 1540324157 is 7514230451.

It can be written as a sum of positive squares in 4 ways, for example, as 21585316 + 1518738841 = 4646^2 + 38971^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1540324157 - 2²² = 1536129853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540324757) 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, 204653 + ... + 212045.

It is an arithmetic number, because the mean of its divisors is an integer number (194813415).

Almost surely, 2^1540324157 is an apocalyptic number.

It is an amenable number.

1540324157 is a deficient number, since it is larger than the sum of its proper divisors (18183163).

1540324157 is an equidigital number, since it uses as much as digits as its factorization.

1540324157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9823.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 1540324157 is about 39246.9636659959. The cubic root of 1540324157 is about 1154.8813698490.

The spelling of 1540324157 in words is "one billion, five hundred forty million, three hundred twenty-four thousand, one hundred fifty-seven".