140351551 has 4 divisors (see below), whose sum is σ = 140412832. Its totient is φ = 140290272.

The previous prime is 140351521. The next prime is 140351597. The reversal of 140351551 is 155153041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155153041 = 5227 ⋅29683.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140351551 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 (140351521) 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, 27066 + ... + 31831.

It is an arithmetic number, because the mean of its divisors is an integer number (35103208).

Almost surely, 2^140351551 is an apocalyptic number.

140351551 is a deficient number, since it is larger than the sum of its proper divisors (61281).

140351551 is an equidigital number, since it uses as much as digits as its factorization.

140351551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61280.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 140351551 is about 11847.0059930769. The cubic root of 140351551 is about 519.6836722547.

The spelling of 140351551 in words is "one hundred forty million, three hundred fifty-one thousand, five hundred fifty-one".