251421302034 has 96 divisors (see below), whose sum is σ = 650250881280. Its totient is φ = 68646289536.

The previous prime is 251421302009. The next prime is 251421302047. The reversal of 251421302034 is 430203124152.

251421302034 is a `hidden beast` number, since 2 + 5 + 1 + 421 + 30 + 203 + 4 = 666.

It is a super-2 number, since 2×251421302034² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251421301989 and 251421302007.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 3057384 + ... + 3138540.

It is an arithmetic number, because the mean of its divisors is an integer number (6773446680).

Almost surely, 2^251421302034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251421302034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325125440640).

251421302034 is an abundant number, since it is smaller than the sum of its proper divisors (398829579246).

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

251421302034 is a wasteful number, since it uses less digits than its factorization.

251421302034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82264 (or 82261 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 251421302034 its reverse (430203124152), we get a palindrome (681624426186).

The spelling of 251421302034 in words is "two hundred fifty-one billion, four hundred twenty-one million, three hundred two thousand, thirty-four".