15122001601 has 4 divisors (see below), whose sum is σ = 17282287552. Its totient is φ = 12961715652.

The previous prime is 15122001577. The next prime is 15122001617. The reversal of 15122001601 is 10610022151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15122001601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15122001641) 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, 1080142965 + ... + 1080142978.

It is an arithmetic number, because the mean of its divisors is an integer number (4320571888).

Almost surely, 2^15122001601 is an apocalyptic number.

It is an amenable number.

15122001601 is a deficient number, since it is larger than the sum of its proper divisors (2160285951).

15122001601 is an equidigital number, since it uses as much as digits as its factorization.

15122001601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160285950.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 15122001601 its reverse (10610022151), we get a palindrome (25732023752).

The spelling of 15122001601 in words is "fifteen billion, one hundred twenty-two million, one thousand, six hundred one".