1540354431 has 32 divisors (see below), whose sum is σ = 2579332608. Its totient is φ = 794327040.

The previous prime is 1540354399. The next prime is 1540354451. The reversal of 1540354431 is 1344530451.

It is not a de Polignac number, because 1540354431 - 2⁵ = 1540354399 is a prime.

It is a super-2 number, since 2×1540354431² = 4745383546202667522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540354451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7311 + ... + 55983.

It is an arithmetic number, because the mean of its divisors is an integer number (80604144).

Almost surely, 2^1540354431 is an apocalyptic number.

1540354431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1540354431 is a deficient number, since it is larger than the sum of its proper divisors (1038978177).

1540354431 is a wasteful number, since it uses less digits than its factorization.

1540354431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48831.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1540354431 is about 39247.3493499880. The cubic root of 1540354431 is about 1154.8889359294. Note that the first 3 decimals are identical.

Adding to 1540354431 its reverse (1344530451), we get a palindrome (2884884882).

The spelling of 1540354431 in words is "one billion, five hundred forty million, three hundred fifty-four thousand, four hundred thirty-one".