51494149 has 6 divisors (see below), whose sum is σ = 59901414. Its totient is φ = 44137800.

The previous prime is 51494119. The next prime is 51494167. The reversal of 51494149 is 94149415.

It can be written as a sum of positive squares in only one way, i.e., 48902049 + 2592100 = 6993^2 + 1610^2 .

It is not a de Polignac number, because 51494149 - 2¹³ = 51485957 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 (51494119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 525402 + ... + 525499.

It is an arithmetic number, because the mean of its divisors is an integer number (9983569).

Almost surely, 2^51494149 is an apocalyptic number.

It is an amenable number.

51494149 is a deficient number, since it is larger than the sum of its proper divisors (8407265).

51494149 is a wasteful number, since it uses less digits than its factorization.

51494149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050915 (or 1050908 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 51494149 is about 7175.9423771377. The cubic root of 51494149 is about 372.0368527293.

The spelling of 51494149 in words is "fifty-one million, four hundred ninety-four thousand, one hundred forty-nine".