140455021423 has 4 divisors (see below), whose sum is σ = 140871802240. Its totient is φ = 140038240608.

The previous prime is 140455021409. The next prime is 140455021481. The reversal of 140455021423 is 324120554041.

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 140455021423 - 2¹⁷ = 140454890351 is a prime.

It is a super-2 number, since 2×140455021423² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140455021823) 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, 208389903 + ... + 208390576.

It is an arithmetic number, because the mean of its divisors is an integer number (35217950560).

Almost surely, 2^140455021423 is an apocalyptic number.

140455021423 is a deficient number, since it is larger than the sum of its proper divisors (416780817).

140455021423 is an equidigital number, since it uses as much as digits as its factorization.

140455021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416780816.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 140455021423 its reverse (324120554041), we get a palindrome (464575575464).

The spelling of 140455021423 in words is "one hundred forty billion, four hundred fifty-five million, twenty-one thousand, four hundred twenty-three".