251342161620342 has 64 divisors (see below), whose sum is σ = 541774258119360. Its totient is φ = 77275784577024.

The previous prime is 251342161620331. The next prime is 251342161620371. The reversal of 251342161620342 is 243026161243152.

It is a super-2 number, since 2×251342161620342² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251342161620294 and 251342161620303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1755393058 + ... + 1755536234.

It is an arithmetic number, because the mean of its divisors is an integer number (8465222783115).

Almost surely, 2^{251342161620342} is an apocalyptic number.

251342161620342 is an abundant number, since it is smaller than the sum of its proper divisors (290432096499018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251342161620342 is a wasteful number, since it uses less digits than its factorization.

251342161620342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160577.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 251342161620342 in words is "two hundred fifty-one trillion, three hundred forty-two billion, one hundred sixty-one million, six hundred twenty thousand, three hundred forty-two".