15225121401 has 64 divisors (see below), whose sum is σ = 24729600000. Its totient is φ = 8138797056.

The previous prime is 15225121399. The next prime is 15225121403. The reversal of 15225121401 is 10412152251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15225121399) and next prime (15225121403).

It is not a de Polignac number, because 15225121401 - 2¹ = 15225121399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15225121403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12189225 + ... + 12190473.

It is an arithmetic number, because the mean of its divisors is an integer number (386400000).

Almost surely, 2^15225121401 is an apocalyptic number.

It is an amenable number.

15225121401 is a deficient number, since it is larger than the sum of its proper divisors (9504478599).

15225121401 is a wasteful number, since it uses less digits than its factorization.

15225121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 15225121401 its reverse (10412152251), we get a palindrome (25637273652).

The spelling of 15225121401 in words is "fifteen billion, two hundred twenty-five million, one hundred twenty-one thousand, four hundred one".