1554780131 has 2 divisors, whose sum is σ = 1554780132. Its totient is φ = 1554780130.

The previous prime is 1554780121. The next prime is 1554780211. The reversal of 1554780131 is 1310874551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1554780131 is a prime.

It is a super-2 number, since 2×1554780131² = 4834682511504754322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1554780091 and 1554780100.

It is not a weakly prime, because it can be changed into another prime (1554780121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777390065 + 777390066.

It is an arithmetic number, because the mean of its divisors is an integer number (777390066).

Almost surely, 2^1554780131 is an apocalyptic number.

1554780131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554780131 is an equidigital number, since it uses as much as digits as its factorization.

1554780131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 1554780131 is about 39430.7003615203. The cubic root of 1554780131 is about 1158.4829879802.

The spelling of 1554780131 in words is "one billion, five hundred fifty-four million, seven hundred eighty thousand, one hundred thirty-one".