140451230621 has 4 divisors (see below), whose sum is σ = 151255171452. Its totient is φ = 129647289792.

The previous prime is 140451230599. The next prime is 140451230671. The reversal of 140451230621 is 126032154041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126032154041 = 317 ⋅397577773.

It can be written as a sum of positive squares in 2 ways, for example, as 10086184900 + 130365045721 = 100430^2 + 361061^2 .

It is a cyclic number.

It is not a de Polignac number, because 140451230621 - 2³⁰ = 139377488797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140451230671) 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, 5401970396 + ... + 5401970421.

It is an arithmetic number, because the mean of its divisors is an integer number (37813792863).

Almost surely, 2^140451230621 is an apocalyptic number.

It is an amenable number.

140451230621 is a deficient number, since it is larger than the sum of its proper divisors (10803940831).

140451230621 is a wasteful number, since it uses less digits than its factorization.

140451230621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10803940830.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 140451230621 its reverse (126032154041), we get a palindrome (266483384662).

The spelling of 140451230621 in words is "one hundred forty billion, four hundred fifty-one million, two hundred thirty thousand, six hundred twenty-one".