51119940 has 48 divisors (see below), whose sum is σ = 147010752. Its totient is φ = 13262976.

The previous prime is 51119933. The next prime is 51119947. The reversal of 51119940 is 4991115.

It is an interprime number because it is at equal distance from previous prime (51119933) and next prime (51119947).

It is a super-2 number, since 2×51119940² = 5226496531207200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51119898 and 51119907.

It is not an unprimeable number, because it can be changed into a prime (51119947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9294 + ... + 13733.

It is an arithmetic number, because the mean of its divisors is an integer number (3062724).

Almost surely, 2^51119940 is an apocalyptic number.

It is an amenable number.

51119940 is an abundant number, since it is smaller than the sum of its proper divisors (95890812).

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

51119940 is a wasteful number, since it uses less digits than its factorization.

51119940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23076 (or 23074 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 51119940 is about 7149.8209767798. The cubic root of 51119940 is about 371.1334611368.

It can be divided in two parts, 5111 and 9940, that added together give a palindrome (15051).

The spelling of 51119940 in words is "fifty-one million, one hundred nineteen thousand, nine hundred forty".