140631481 has 8 divisors (see below), whose sum is σ = 142702560. Its totient is φ = 138571488.

The previous prime is 140631461. The next prime is 140631541. The reversal of 140631481 is 184136041.

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 140631481 - 2¹³ = 140623289 is a prime.

It is a super-2 number, since 2×140631481² = 39554426896506722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140631431) 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, 24750 + ... + 29896.

It is an arithmetic number, because the mean of its divisors is an integer number (17837820).

Almost surely, 2^140631481 is an apocalyptic number.

It is an amenable number.

140631481 is a deficient number, since it is larger than the sum of its proper divisors (2071079).

140631481 is an equidigital number, since it uses as much as digits as its factorization.

140631481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 140631481 is about 11858.8144854366. The cubic root of 140631481 is about 520.0289443948.

The spelling of 140631481 in words is "one hundred forty million, six hundred thirty-one thousand, four hundred eighty-one".