51613487 has 6 divisors (see below), whose sum is σ = 51926952. Its totient is φ = 51301172.

The previous prime is 51613477. The next prime is 51613489. The reversal of 51613487 is 78431615.

It is not a de Polignac number, because 51613487 - 2⁶ = 51613423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51613489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116288 + ... + 116730.

It is an arithmetic number, because the mean of its divisors is an integer number (8654492).

Almost surely, 2^51613487 is an apocalyptic number.

51613487 is a deficient number, since it is larger than the sum of its proper divisors (313465).

51613487 is an frugal number, since it uses more digits than its factorization.

51613487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 706 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 51613487 is about 7184.2527099205. The cubic root of 51613487 is about 372.3240302128.

The spelling of 51613487 in words is "fifty-one million, six hundred thirteen thousand, four hundred eighty-seven".