15250514381 has 2 divisors, whose sum is σ = 15250514382. Its totient is φ = 15250514380.

The previous prime is 15250514359. The next prime is 15250514393. The reversal of 15250514381 is 18341505251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12491638756 + 2758875625 = 111766^2 + 52525^2 .

It is a cyclic number.

It is not a de Polignac number, because 15250514381 - 2³⁰ = 14176772557 is a prime.

It is a super-2 number, since 2×15250514381² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15250514311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7625257190 + 7625257191.

It is an arithmetic number, because the mean of its divisors is an integer number (7625257191).

Almost surely, 2^15250514381 is an apocalyptic number.

It is an amenable number.

15250514381 is a deficient number, since it is larger than the sum of its proper divisors (1).

15250514381 is an equidigital number, since it uses as much as digits as its factorization.

15250514381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24000, while the sum is 35.

The spelling of 15250514381 in words is "fifteen billion, two hundred fifty million, five hundred fourteen thousand, three hundred eighty-one".