51020006 has 4 divisors (see below), whose sum is σ = 76530012. Its totient is φ = 25510002.

The previous prime is 51019999. The next prime is 51020029. The reversal of 51020006 is 60002015.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755000 + ... + 12755003.

It is an arithmetic number, because the mean of its divisors is an integer number (19132503).

Almost surely, 2^51020006 is an apocalyptic number.

51020006 is a deficient number, since it is larger than the sum of its proper divisors (25510006).

51020006 is a wasteful number, since it uses less digits than its factorization.

51020006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25510005.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51020006 is about 7142.8289913731. The cubic root of 51020006 is about 370.8914613364.

Subtracting 51020006 from its reverse (60002015), we obtain a square (8982009 = 2997²).

The spelling of 51020006 in words is "fifty-one million, twenty thousand, six".