220251242351 has 4 divisors (see below), whose sum is σ = 251715705552. Its totient is φ = 188786779152.

The previous prime is 220251242347. The next prime is 220251242353. The reversal of 220251242351 is 153242152022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153242152022 = 2 ⋅76621076011.

It is a cyclic number.

It is not a de Polignac number, because 220251242351 - 2² = 220251242347 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 (220251242353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15732231590 + ... + 15732231603.

It is an arithmetic number, because the mean of its divisors is an integer number (62928926388).

Almost surely, 2^220251242351 is an apocalyptic number.

220251242351 is a deficient number, since it is larger than the sum of its proper divisors (31464463201).

220251242351 is an equidigital number, since it uses as much as digits as its factorization.

220251242351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31464463200.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 220251242351 its reverse (153242152022), we get a palindrome (373493394373).

The spelling of 220251242351 in words is "two hundred twenty billion, two hundred fifty-one million, two hundred forty-two thousand, three hundred fifty-one".