1540233651 has 32 divisors (see below), whose sum is σ = 2368270080. Its totient is φ = 880588800.

The previous prime is 1540233647. The next prime is 1540233659. The reversal of 1540233651 is 1563320451.

It is not a de Polignac number, because 1540233651 - 2² = 1540233647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1540233659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146011 + ... + 156203.

It is an arithmetic number, because the mean of its divisors is an integer number (74008440).

Almost surely, 2^1540233651 is an apocalyptic number.

1540233651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1540233651 is a deficient number, since it is larger than the sum of its proper divisors (828036429).

1540233651 is a wasteful number, since it uses less digits than its factorization.

1540233651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10467.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1540233651 is about 39245.8106171856. The cubic root of 1540233651 is about 1154.8587499911.

The spelling of 1540233651 in words is "one billion, five hundred forty million, two hundred thirty-three thousand, six hundred fifty-one".