61513012 has 36 divisors (see below), whose sum is σ = 120013348. Its totient is φ = 27561600.

The previous prime is 61513007. The next prime is 61513027. The reversal of 61513012 is 21031516.

It can be written as a sum of positive squares in 2 ways, for example, as 11329956 + 50183056 = 3366^2 + 7084^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34462 + ... + 36202.

Almost surely, 2^61513012 is an apocalyptic number.

It is an amenable number.

61513012 is a deficient number, since it is larger than the sum of its proper divisors (58500336).

61513012 is a wasteful number, since it uses less digits than its factorization.

61513012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61513012 is about 7843.0231416208. The cubic root of 61513012 is about 394.7501747724.

Adding to 61513012 its reverse (21031516), we get a palindrome (82544528).

The spelling of 61513012 in words is "sixty-one million, five hundred thirteen thousand, twelve".