140431553 has 4 divisors (see below), whose sum is σ = 140456148. Its totient is φ = 140406960.

The previous prime is 140431549. The next prime is 140431579. The reversal of 140431553 is 355134041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355134041 = 1237 ⋅287093.

It can be written as a sum of positive squares in 2 ways, for example, as 53699584 + 86731969 = 7328^2 + 9313^2 .

It is a cyclic number.

It is not a de Polignac number, because 140431553 - 2² = 140431549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140431513) 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, 1223 + ... + 16803.

It is an arithmetic number, because the mean of its divisors is an integer number (35114037).

Almost surely, 2^140431553 is an apocalyptic number.

It is an amenable number.

140431553 is a deficient number, since it is larger than the sum of its proper divisors (24595).

140431553 is an equidigital number, since it uses as much as digits as its factorization.

140431553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24594.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 140431553 is about 11850.3819769660. The cubic root of 140431553 is about 519.7823953915.

Adding to 140431553 its reverse (355134041), we get a palindrome (495565594).

The spelling of 140431553 in words is "one hundred forty million, four hundred thirty-one thousand, five hundred fifty-three".