51670040 has 32 divisors (see below), whose sum is σ = 116657280. Its totient is φ = 20596992.

The previous prime is 51670027. The next prime is 51670043. The reversal of 51670040 is 4007615.

It is a junction number, because it is equal to n+sod(n) for n = 51669988 and 51670015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51670043) 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, 10457 + ... + 14583.

It is an arithmetic number, because the mean of its divisors is an integer number (3645540).

Almost surely, 2^51670040 is an apocalyptic number.

It is an amenable number.

51670040 is an abundant number, since it is smaller than the sum of its proper divisors (64987240).

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

51670040 is a wasteful number, since it uses less digits than its factorization.

51670040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451 (or 4447 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51670040 is about 7188.1875323339. The cubic root of 51670040 is about 372.4599659691.

Adding to 51670040 its reverse (4007615), we get a palindrome (55677655).

The spelling of 51670040 in words is "fifty-one million, six hundred seventy thousand, forty".