251790221413 has 8 divisors (see below), whose sum is σ = 263686140288. Its totient is φ = 239973345744.

The previous prime is 251790221411. The next prime is 251790221453. The reversal of 251790221413 is 314122097152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251790221413 - 2¹ = 251790221411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251790221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19754281 + ... + 19767022.

It is an arithmetic number, because the mean of its divisors is an integer number (32960767536).

Almost surely, 2^251790221413 is an apocalyptic number.

251790221413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

251790221413 is a deficient number, since it is larger than the sum of its proper divisors (11895918875).

251790221413 is a wasteful number, since it uses less digits than its factorization.

251790221413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39521603.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 251790221413 in words is "two hundred fifty-one billion, seven hundred ninety million, two hundred twenty-one thousand, four hundred thirteen".