15155021451 has 4 divisors (see below), whose sum is σ = 20206695272. Its totient is φ = 10103347632.

The previous prime is 15155021423. The next prime is 15155021459. The reversal of 15155021451 is 15412055151.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15155021451 - 2⁵ = 15155021419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15155021459) 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, 2525836906 + ... + 2525836911.

It is an arithmetic number, because the mean of its divisors is an integer number (5051673818).

Almost surely, 2^15155021451 is an apocalyptic number.

15155021451 is a deficient number, since it is larger than the sum of its proper divisors (5051673821).

15155021451 is an equidigital number, since it uses as much as digits as its factorization.

15155021451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051673820.

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 15155021451 in words is "fifteen billion, one hundred fifty-five million, twenty-one thousand, four hundred fifty-one".