15290252981 has 4 divisors (see below), whose sum is σ = 15290532972. Its totient is φ = 15289972992.

The previous prime is 15290252969. The next prime is 15290253001. The reversal of 15290252981 is 18925209251.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1450848100 + 13839404881 = 38090^2 + 117641^2 .

It is a cyclic number.

It is not a de Polignac number, because 15290252981 - 2⁶ = 15290252917 is a prime.

It is a super-2 number, since 2×15290252981² (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 (15290252921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28460 + ... + 177173.

It is an arithmetic number, because the mean of its divisors is an integer number (3822633243).

Almost surely, 2^15290252981 is an apocalyptic number.

It is an amenable number.

15290252981 is a deficient number, since it is larger than the sum of its proper divisors (279991).

15290252981 is an equidigital number, since it uses as much as digits as its factorization.

15290252981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279990.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 15290252981 in words is "fifteen billion, two hundred ninety million, two hundred fifty-two thousand, nine hundred eighty-one".