251121252350 has 12 divisors (see below), whose sum is σ = 467085529464. Its totient is φ = 100448500920.

The previous prime is 251121252311. The next prime is 251121252373. The reversal of 251121252350 is 53252121152.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2511212474 + ... + 2511212573.

It is an arithmetic number, because the mean of its divisors is an integer number (38923794122).

Almost surely, 2^251121252350 is an apocalyptic number.

251121252350 is a deficient number, since it is larger than the sum of its proper divisors (215964277114).

251121252350 is a wasteful number, since it uses less digits than its factorization.

251121252350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022425059 (or 5022425054 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 251121252350 in words is "two hundred fifty-one billion, one hundred twenty-one million, two hundred fifty-two thousand, three hundred fifty".