623251230242 has 4 divisors (see below), whose sum is σ = 934876845366. Its totient is φ = 311625615120.

The previous prime is 623251230229. The next prime is 623251230299. The reversal of 623251230242 is 242032152326.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242032152326 = 2 ⋅121016076163.

It can be written as a sum of positive squares in only one way, i.e., 410085263641 + 213165966601 = 640379^2 + 461699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 623251230199 and 623251230208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155812807559 + ... + 155812807562.

Almost surely, 2^623251230242 is an apocalyptic number.

623251230242 is a deficient number, since it is larger than the sum of its proper divisors (311625615124).

623251230242 is a wasteful number, since it uses less digits than its factorization.

623251230242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311625615123.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 623251230242 its reverse (242032152326), we get a palindrome (865283382568).

The spelling of 623251230242 in words is "six hundred twenty-three billion, two hundred fifty-one million, two hundred thirty thousand, two hundred forty-two".