51151380 has 48 divisors (see below), whose sum is σ = 163685760. Its totient is φ = 11691648.

The previous prime is 51151357. The next prime is 51151403. The reversal of 51151380 is 8315115.

It is an interprime number because it is at equal distance from previous prime (51151357) and next prime (51151403).

It is a self number, because there is not a number n which added to its sum of digits gives 51151380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60475 + ... + 61314.

It is an arithmetic number, because the mean of its divisors is an integer number (3410120).

Almost surely, 2^51151380 is an apocalyptic number.

It is an amenable number.

51151380 is an abundant number, since it is smaller than the sum of its proper divisors (112534380).

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

51151380 is a wasteful number, since it uses less digits than its factorization.

51151380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121808 (or 121806 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 51151380 is about 7152.0192952760. The cubic root of 51151380 is about 371.2095308969.

Adding to 51151380 its reverse (8315115), we get a palindrome (59466495).

The spelling of 51151380 in words is "fifty-one million, one hundred fifty-one thousand, three hundred eighty".