50131987 has 2 divisors, whose sum is σ = 50131988. Its totient is φ = 50131986.

The previous prime is 50131967. The next prime is 50132029. The reversal of 50131987 is 78913105.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50131987 - 2¹¹ = 50129939 is a prime.

It is a super-2 number, since 2×50131987² = 5026432241136338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50131967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25065993 + 25065994.

It is an arithmetic number, because the mean of its divisors is an integer number (25065994).

Almost surely, 2^50131987 is an apocalyptic number.

50131987 is a deficient number, since it is larger than the sum of its proper divisors (1).

50131987 is an equidigital number, since it uses as much as digits as its factorization.

50131987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 50131987 is about 7080.3945511532. The cubic root of 50131987 is about 368.7270278900.

The spelling of 50131987 in words is "fifty million, one hundred thirty-one thousand, nine hundred eighty-seven".