140161531 has 8 divisors (see below), whose sum is σ = 141120000. Its totient is φ = 139206912.

The previous prime is 140161523. The next prime is 140161543. The reversal of 140161531 is 135161041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140161531 - 2³ = 140161523 is a prime.

It is a super-2 number, since 2×140161531² = 39290509544527922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140168531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111595 + ... + 112843.

It is an arithmetic number, because the mean of its divisors is an integer number (17640000).

Almost surely, 2^140161531 is an apocalyptic number.

140161531 is a deficient number, since it is larger than the sum of its proper divisors (958469).

140161531 is a wasteful number, since it uses less digits than its factorization.

140161531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 140161531 is about 11838.9835290028. The cubic root of 140161531 is about 519.4490355162.

The spelling of 140161531 in words is "one hundred forty million, one hundred sixty-one thousand, five hundred thirty-one".