51650642 has 16 divisors (see below), whose sum is σ = 78301080.
Its totient is φ = 25552128.
The previous prime is 51650633. The next prime is 51650659. The reversal of 51650642 is 24605615.
It can be written as a sum of positive squares in 4 ways, for example, as 46226401 + 5424241 = 6799^2 + 2329^2
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132584 + ... + 132972.
Almost surely, 251650642 is an apocalyptic number.
51650642 is a deficient number, since it is larger than the sum of its proper divisors (26650438).
51650642 is a wasteful number, since it uses less digits than its factorization.
51650642 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 925.
The product of its (nonzero) digits is 7200, while the sum is 29.
The square root of 51650642 is about 7186.8381086539.
The cubic root of 51650642 is about 372.4133504143.
The spelling of 51650642 in words is "fifty-one million, six hundred fifty thousand, six hundred forty-two".