51030432 has 48 divisors (see below), whose sum is σ = 148841280. Its totient is φ = 17009856.

The previous prime is 51030403. The next prime is 51030449. The reversal of 51030432 is 23403015.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28668 + ... + 30395.

It is an arithmetic number, because the mean of its divisors is an integer number (3100860).

Almost surely, 2^51030432 is an apocalyptic number.

It is an amenable number.

51030432 is an abundant number, since it is smaller than the sum of its proper divisors (97810848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51030432 is a wasteful number, since it uses less digits than its factorization.

51030432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59082 (or 59068 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51030432 is about 7143.5587769682. The cubic root of 51030432 is about 370.9167236554.

Adding to 51030432 its reverse (23403015), we get a palindrome (74433447).

The spelling of 51030432 in words is "fifty-one million, thirty thousand, four hundred thirty-two".