51061629 has 4 divisors (see below), whose sum is σ = 68082176. Its totient is φ = 34041084.

The previous prime is 51061613. The next prime is 51061639. The reversal of 51061629 is 92616015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51061629 - 2⁴ = 51061613 is a prime.

It is a super-2 number, since 2×51061629² = 5214579912267282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51061596 and 51061605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51061639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8510269 + ... + 8510274.

It is an arithmetic number, because the mean of its divisors is an integer number (17020544).

Almost surely, 2^51061629 is an apocalyptic number.

It is an amenable number.

51061629 is a deficient number, since it is larger than the sum of its proper divisors (17020547).

51061629 is a wasteful number, since it uses less digits than its factorization.

51061629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17020546.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51061629 is about 7145.7420188529. The cubic root of 51061629 is about 370.9922938027.

The spelling of 51061629 in words is "fifty-one million, sixty-one thousand, six hundred twenty-nine".