140403331 has 4 divisors (see below), whose sum is σ = 147793000. Its totient is φ = 133013664.

The previous prime is 140403301. The next prime is 140403337. The reversal of 140403331 is 133304041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140403331 - 2¹³ = 140395139 is a prime.

It is a super-2 number, since 2×140403331² = 39426190711791122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 7389649 = 140403331 / (1 + 4 + 0 + 4 + 0 + 3 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140403299 and 140403308.

It is not an unprimeable number, because it can be changed into a prime (140403337) 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, 3694806 + ... + 3694843.

It is an arithmetic number, because the mean of its divisors is an integer number (36948250).

Almost surely, 2^140403331 is an apocalyptic number.

140403331 is a deficient number, since it is larger than the sum of its proper divisors (7389669).

140403331 is an equidigital number, since it uses as much as digits as its factorization.

140403331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7389668.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 140403331 is about 11849.1911538299. The cubic root of 140403331 is about 519.7475734889.

Adding to 140403331 its reverse (133304041), we get a palindrome (273707372).

It can be divided in two parts, 14040 and 3331, that added together give a palindrome (17371).

The spelling of 140403331 in words is "one hundred forty million, four hundred three thousand, three hundred thirty-one".