251301561045142 has 4 divisors (see below), whose sum is σ = 376952341567716. Its totient is φ = 125650780522570.

The previous prime is 251301561045113. The next prime is 251301561045149. The reversal of 251301561045142 is 241540165103152.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×251301561045142² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251301561045095 and 251301561045104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251301561045149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62825390261284 + ... + 62825390261287.

It is an arithmetic number, because the mean of its divisors is an integer number (94238085391929).

Almost surely, 2^{251301561045142} is an apocalyptic number.

251301561045142 is a deficient number, since it is larger than the sum of its proper divisors (125650780522574).

251301561045142 is a wasteful number, since it uses less digits than its factorization.

251301561045142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125650780522573.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 251301561045142 in words is "two hundred fifty-one trillion, three hundred one billion, five hundred sixty-one million, forty-five thousand, one hundred forty-two".