251650425442 has 16 divisors (see below), whose sum is σ = 410458950720. Its totient is φ = 115018714512.

The previous prime is 251650425431. The next prime is 251650425443. The reversal of 251650425442 is 244524056152.

It is a junction number, because it is equal to n+sod(n) for n = 251650425395 and 251650425404.

It is not an unprimeable number, because it can be changed into a prime (251650425443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46982092 + ... + 46987447.

It is an arithmetic number, because the mean of its divisors is an integer number (25653684420).

Almost surely, 2^251650425442 is an apocalyptic number.

251650425442 is a deficient number, since it is larger than the sum of its proper divisors (158808525278).

251650425442 is a wasteful number, since it uses less digits than its factorization.

251650425442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93969657.

The product of its (nonzero) digits is 384000, while the sum is 40.

The spelling of 251650425442 in words is "two hundred fifty-one billion, six hundred fifty million, four hundred twenty-five thousand, four hundred forty-two".