51350949 has 16 divisors (see below), whose sum is σ = 81928000. Its totient is φ = 31600368.

The previous prime is 51350947. The next prime is 51350951. The reversal of 51350949 is 94905315.

51350949 is a `hidden beast` number, since 513 + 50 + 94 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (51350947) and next prime (51350951).

It is not a de Polignac number, because 51350949 - 2¹ = 51350947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51350941) 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, 72799 + ... + 73500.

It is an arithmetic number, because the mean of its divisors is an integer number (5120500).

Almost surely, 2^51350949 is an apocalyptic number.

It is an amenable number.

51350949 is a deficient number, since it is larger than the sum of its proper divisors (30577051).

51350949 is a wasteful number, since it uses less digits than its factorization.

51350949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146321 (or 146315 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 51350949 is about 7165.9576470978. The cubic root of 51350949 is about 371.6916669847.

The spelling of 51350949 in words is "fifty-one million, three hundred fifty thousand, nine hundred forty-nine".