15421001551 has 2 divisors, whose sum is σ = 15421001552. Its totient is φ = 15421001550.

The previous prime is 15421001537. The next prime is 15421001579. The reversal of 15421001551 is 15510012451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15421001551 - 2¹³ = 15420993359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15421001251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710500775 + 7710500776.

It is an arithmetic number, because the mean of its divisors is an integer number (7710500776).

Almost surely, 2^15421001551 is an apocalyptic number.

15421001551 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421001551 is an equidigital number, since it uses as much as digits as its factorization.

15421001551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 15421001551 in words is "fifteen billion, four hundred twenty-one million, one thousand, five hundred fifty-one".