1551202253242 has 16 divisors (see below), whose sum is σ = 2357213628672. Its totient is φ = 765483238080.

The previous prime is 1551202253219. The next prime is 1551202253243. The reversal of 1551202253242 is 2423522021551.

It is a junction number, because it is equal to n+sod(n) for n = 1551202253198 and 1551202253207.

It is not an unprimeable number, because it can be changed into a prime (1551202253243) 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, 4550223 + ... + 4879234.

It is an arithmetic number, because the mean of its divisors is an integer number (147325851792).

Almost surely, 2^{1551202253242} is an apocalyptic number.

1551202253242 is a deficient number, since it is larger than the sum of its proper divisors (806011375430).

1551202253242 is an equidigital number, since it uses as much as digits as its factorization.

1551202253242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9430533.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 1551202253242 its reverse (2423522021551), we get a palindrome (3974724274793).

The spelling of 1551202253242 in words is "one trillion, five hundred fifty-one billion, two hundred two million, two hundred fifty-three thousand, two hundred forty-two".