51011442 has 12 divisors (see below), whose sum is σ = 110524830. Its totient is φ = 17003808.

The previous prime is 51011437. The next prime is 51011453. The reversal of 51011442 is 24411015.

51011442 is a `hidden beast` number, since 510 + 114 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48734361 + 2277081 = 6981^2 + 1509^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2833969 = 51011442 / (5 + 1 + 0 + 1 + 1 + 4 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1416967 + ... + 1417002.

Almost surely, 2^51011442 is an apocalyptic number.

51011442 is an abundant number, since it is smaller than the sum of its proper divisors (59513388).

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

51011442 is a wasteful number, since it uses less digits than its factorization.

51011442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833977 (or 2833974 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 51011442 is about 7142.2294838517. The cubic root of 51011442 is about 370.8707080904.

Adding to 51011442 its reverse (24411015), we get a palindrome (75422457).

The spelling of 51011442 in words is "fifty-one million, eleven thousand, four hundred forty-two".