1387525531305 has 16 divisors (see below), whose sum is σ = 2267275762944. Its totient is φ = 724268645760.

The previous prime is 1387525531297. The next prime is 1387525531309. The reversal of 1387525531305 is 5031355257831.

It is not a de Polignac number, because 1387525531305 - 2³ = 1387525531297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1387525531309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984059956 + ... + 984061365.

It is an arithmetic number, because the mean of its divisors is an integer number (141704735184).

Almost surely, 2^{1387525531305} is an apocalyptic number.

1387525531305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387525531305 is a deficient number, since it is larger than the sum of its proper divisors (879750231639).

1387525531305 is a wasteful number, since it uses less digits than its factorization.

1387525531305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968121376.

The product of its (nonzero) digits is 1890000, while the sum is 48.

The spelling of 1387525531305 in words is "one trillion, three hundred eighty-seven billion, five hundred twenty-five million, five hundred thirty-one thousand, three hundred five".