15020345551 has 4 divisors (see below), whose sum is σ = 15022937952. Its totient is φ = 15017753152.

The previous prime is 15020345539. The next prime is 15020345581. The reversal of 15020345551 is 15554302051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15554302051 = 4813 ⋅3231727.

It is a cyclic number.

It is not a de Polignac number, because 15020345551 - 2¹⁷ = 15020214479 is a prime.

It is a super-2 number, since 2×15020345551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15020345581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287490 + ... + 1299103.

It is an arithmetic number, because the mean of its divisors is an integer number (3755734488).

Almost surely, 2^15020345551 is an apocalyptic number.

15020345551 is a deficient number, since it is larger than the sum of its proper divisors (2592401).

15020345551 is an equidigital number, since it uses as much as digits as its factorization.

15020345551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592400.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 15020345551 in words is "fifteen billion, twenty million, three hundred forty-five thousand, five hundred fifty-one".