51521541 has 16 divisors (see below), whose sum is σ = 73211904. Its totient is φ = 32153264.

The previous prime is 51521539. The next prime is 51521549. The reversal of 51521541 is 14512515.

It is not a de Polignac number, because 51521541 - 2¹ = 51521539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51521549) 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, 4701 + ... + 11186.

It is an arithmetic number, because the mean of its divisors is an integer number (4575744).

Almost surely, 2^51521541 is an apocalyptic number.

It is an amenable number.

51521541 is a deficient number, since it is larger than the sum of its proper divisors (21690363).

51521541 is a wasteful number, since it uses less digits than its factorization.

51521541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15960.

The product of its digits is 1000, while the sum is 24.

The square root of 51521541 is about 7177.8507228836. The cubic root of 51521541 is about 372.1028086176.

The spelling of 51521541 in words is "fifty-one million, five hundred twenty-one thousand, five hundred forty-one".