1501122251 has 4 divisors (see below), whose sum is σ = 1507677600. Its totient is φ = 1494566904.

The previous prime is 1501122223. The next prime is 1501122281. The reversal of 1501122251 is 1522211051.

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

It is a cyclic number.

It is not a de Polignac number, because 1501122251 - 2¹⁰ = 1501121227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1501122281) 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, 3277331 + ... + 3277788.

It is an arithmetic number, because the mean of its divisors is an integer number (376919400).

Almost surely, 2^1501122251 is an apocalyptic number.

1501122251 is a deficient number, since it is larger than the sum of its proper divisors (6555349).

1501122251 is an equidigital number, since it uses as much as digits as its factorization.

1501122251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6555348.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1501122251 is about 38744.3189512992. The cubic root of 1501122251 is about 1144.9996506549. Note that the first 3 decimals are identical.

The spelling of 1501122251 in words is "one billion, five hundred one million, one hundred twenty-two thousand, two hundred fifty-one".