51132380 has 24 divisors (see below), whose sum is σ = 115638432. Its totient is φ = 18879552.

The previous prime is 51132353. The next prime is 51132383. The reversal of 51132380 is 8323115.

It is a super-2 number, since 2×51132380² = 5229040568928800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98072 + ... + 98591.

It is an arithmetic number, because the mean of its divisors is an integer number (4818268).

Almost surely, 2^51132380 is an apocalyptic number.

It is an amenable number.

51132380 is an abundant number, since it is smaller than the sum of its proper divisors (64506052).

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

51132380 is a wasteful number, since it uses less digits than its factorization.

51132380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196685 (or 196683 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51132380 is about 7150.6908757126. The cubic root of 51132380 is about 371.1635637139.

Adding to 51132380 its reverse (8323115), we get a palindrome (59455495).

The spelling of 51132380 in words is "fifty-one million, one hundred thirty-two thousand, three hundred eighty".