15122420443 has 16 divisors (see below), whose sum is σ = 17408252736. Its totient is φ = 13026562560.

The previous prime is 15122420441. The next prime is 15122420459. The reversal of 15122420443 is 34402422151.

It is a cyclic number.

It is not a de Polignac number, because 15122420443 - 2¹ = 15122420441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15122420441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604530 + ... + 629047.

It is an arithmetic number, because the mean of its divisors is an integer number (1088015796).

Almost surely, 2^15122420443 is an apocalyptic number.

15122420443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15122420443 is a deficient number, since it is larger than the sum of its proper divisors (2285832293).

15122420443 is a wasteful number, since it uses less digits than its factorization.

15122420443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233654.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 15122420443 its reverse (34402422151), we get a palindrome (49524842594).

The spelling of 15122420443 in words is "fifteen billion, one hundred twenty-two million, four hundred twenty thousand, four hundred forty-three".