140402331 has 12 divisors (see below), whose sum is σ = 202925320. Its totient is φ = 93545280.

The previous prime is 140402329. The next prime is 140402341. The reversal of 140402331 is 133204041.

It is not a de Polignac number, because 140402331 - 2¹ = 140402329 is a prime.

It is a super-2 number, since 2×140402331² = 39425629100467122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140402321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15840 + ... + 23058.

Almost surely, 2^140402331 is an apocalyptic number.

140402331 is a deficient number, since it is larger than the sum of its proper divisors (62522989).

140402331 is a wasteful number, since it uses less digits than its factorization.

140402331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9386 (or 9383 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 140402331 is about 11849.1489567817. The cubic root of 140402331 is about 519.7463395467.

Adding to 140402331 its reverse (133204041), we get a palindrome (273606372).

The spelling of 140402331 in words is "one hundred forty million, four hundred two thousand, three hundred thirty-one".