15442206397 has 12 divisors (see below), whose sum is σ = 15820898940. Its totient is φ = 15072384768.

The previous prime is 15442206391. The next prime is 15442206473. The reversal of 15442206397 is 79360224451.

It can be written as a sum of positive squares in 2 ways, for example, as 5082834436 + 10359371961 = 71294^2 + 101781^2 .

It is not a de Polignac number, because 15442206397 - 2³ = 15442206389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15442206391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4267533 + ... + 4271149.

It is an arithmetic number, because the mean of its divisors is an integer number (1318408245).

Almost surely, 2^15442206397 is an apocalyptic number.

It is an amenable number.

15442206397 is a deficient number, since it is larger than the sum of its proper divisors (378692543).

15442206397 is an equidigital number, since it uses as much as digits as its factorization.

15442206397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012 (or 5969 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 15442206397 in words is "fifteen billion, four hundred forty-two million, two hundred six thousand, three hundred ninety-seven".