253221511407 has 8 divisors (see below), whose sum is σ = 337644478080. Its totient is φ = 168806442840.

The previous prime is 253221511397. The next prime is 253221511469. The reversal of 253221511407 is 704115122352.

It is a happy number.

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

It is not a de Polignac number, because 253221511407 - 2¹⁸ = 253221249263 is a prime.

It is a super-2 number, since 2×253221511407² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253221516407) 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, 1899307 + ... + 2028252.

It is an arithmetic number, because the mean of its divisors is an integer number (42205559760).

Almost surely, 2^253221511407 is an apocalyptic number.

253221511407 is a deficient number, since it is larger than the sum of its proper divisors (84422966673).

253221511407 is a wasteful number, since it uses less digits than its factorization.

253221511407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949053.

The product of its (nonzero) digits is 16800, while the sum is 33.

Adding to 253221511407 its reverse (704115122352), we get a palindrome (957336633759).

The spelling of 253221511407 in words is "two hundred fifty-three billion, two hundred twenty-one million, five hundred eleven thousand, four hundred seven".