1387527751531 has 2 divisors, whose sum is σ = 1387527751532. Its totient is φ = 1387527751530.

The previous prime is 1387527751499. The next prime is 1387527751553. The reversal of 1387527751531 is 1351577257831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387527751531 - 2⁵ = 1387527751499 is a prime.

It is a super-2 number, since 2×1387527751531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1387527731531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693763875765 + 693763875766.

It is an arithmetic number, because the mean of its divisors is an integer number (693763875766).

Almost surely, 2^{1387527751531} is an apocalyptic number.

1387527751531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387527751531 is an equidigital number, since it uses as much as digits as its factorization.

1387527751531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6174000, while the sum is 55.

The spelling of 1387527751531 in words is "one trillion, three hundred eighty-seven billion, five hundred twenty-seven million, seven hundred fifty-one thousand, five hundred thirty-one".