16147225631 has 4 divisors (see below), whose sum is σ = 16165430832. Its totient is φ = 16129020432.

The previous prime is 16147225597. The next prime is 16147225667. The reversal of 16147225631 is 13652274161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13652274161 = 1481 ⋅9218281.

It is a cyclic number.

It is not a de Polignac number, because 16147225631 - 2¹⁸ = 16146963487 is a prime.

It is a super-2 number, since 2×16147225631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16147225681) 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, 9101270 + ... + 9103043.

It is an arithmetic number, because the mean of its divisors is an integer number (4041357708).

Almost surely, 2^16147225631 is an apocalyptic number.

16147225631 is a deficient number, since it is larger than the sum of its proper divisors (18205201).

16147225631 is an equidigital number, since it uses as much as digits as its factorization.

16147225631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18205200.

The product of its digits is 60480, while the sum is 38.

Adding to 16147225631 its reverse (13652274161), we get a palindrome (29799499792).

The spelling of 16147225631 in words is "sixteen billion, one hundred forty-seven million, two hundred twenty-five thousand, six hundred thirty-one".