15200981 has 2 divisors, whose sum is σ = 15200982. Its totient is φ = 15200980.

The previous prime is 15200971. The next prime is 15200987. The reversal of 15200981 is 18900251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14945956 + 255025 = 3866^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 15200981 - 2¹⁰ = 15199957 is a prime.

It is a super-2 number, since 2×15200981² = 462139646724722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15200981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15200987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7600490 + 7600491.

It is an arithmetic number, because the mean of its divisors is an integer number (7600491).

Almost surely, 2^15200981 is an apocalyptic number.

It is an amenable number.

15200981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15200981 is an equidigital number, since it uses as much as digits as its factorization.

15200981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 15200981 is about 3898.8435464891. The cubic root of 15200981 is about 247.7177948888.

The spelling of 15200981 in words is "fifteen million, two hundred thousand, nine hundred eighty-one".