140622731 has 6 divisors (see below), whose sum is σ = 143680620. Its totient is φ = 137628596.

The previous prime is 140622721. The next prime is 140622761. The reversal of 140622731 is 137226041.

140622731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-140622731 is a prime.

It is a super-2 number, since 2×140622731² = 39549504947796722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140622731.

It is not an unprimeable number, because it can be changed into a prime (140622721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29621 + ... + 34038.

It is an arithmetic number, because the mean of its divisors is an integer number (23946770).

Almost surely, 2^140622731 is an apocalyptic number.

140622731 is a deficient number, since it is larger than the sum of its proper divisors (3057889).

140622731 is an frugal number, since it uses more digits than its factorization.

140622731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63753 (or 63706 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 140622731 is about 11858.4455558054. The cubic root of 140622731 is about 520.0181588826.

Adding to 140622731 its reverse (137226041), we get a palindrome (277848772).

The spelling of 140622731 in words is "one hundred forty million, six hundred twenty-two thousand, seven hundred thirty-one".