51346987 has 16 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 45118080.

The previous prime is 51346979. The next prime is 51346993. The reversal of 51346987 is 78964315.

It is a cyclic number.

It is not a de Polignac number, because 51346987 - 2³ = 51346979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51346927) 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, 21814 + ... + 24052.

It is an arithmetic number, because the mean of its divisors is an integer number (3628800).

Almost surely, 2^51346987 is an apocalyptic number.

51346987 is a deficient number, since it is larger than the sum of its proper divisors (6713813).

51346987 is a wasteful number, since it uses less digits than its factorization.

51346987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346.

The product of its digits is 181440, while the sum is 43.

The square root of 51346987 is about 7165.6811958110. The cubic root of 51346987 is about 371.6821074064.

It can be divided in two parts, 5134 and 6987, that added together give a palindrome (12121).

The spelling of 51346987 in words is "fifty-one million, three hundred forty-six thousand, nine hundred eighty-seven".