140801531 has 16 divisors (see below), whose sum is σ = 161328384. Its totient is φ = 121734144.

The previous prime is 140801527. The next prime is 140801543. The reversal of 140801531 is 135108041.

It is not a de Polignac number, because 140801531 - 2² = 140801527 is a prime.

It is a super-2 number, since 2×140801531² = 39650142263887922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140801497 and 140801506.

It is not an unprimeable number, because it can be changed into a prime (140801431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47855 + ... + 50711.

It is an arithmetic number, because the mean of its divisors is an integer number (10083024).

Almost surely, 2^140801531 is an apocalyptic number.

140801531 is a deficient number, since it is larger than the sum of its proper divisors (20526853).

140801531 is a wasteful number, since it uses less digits than its factorization.

140801531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 140801531 is about 11865.9820916770. The cubic root of 140801531 is about 520.2384643450.

Adding to 140801531 its reverse (135108041), we get a palindrome (275909572).

The spelling of 140801531 in words is "one hundred forty million, eight hundred one thousand, five hundred thirty-one".