61287224 has 32 divisors (see below), whose sum is σ = 116748000. Its totient is φ = 30159360.

The previous prime is 61287221. The next prime is 61287263. The reversal of 61287224 is 42278216.

It is a super-2 number, since 2×61287224² = 7512247651252352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61287221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217964 + ... + 218244.

It is an arithmetic number, because the mean of its divisors is an integer number (3648375).

Almost surely, 2^61287224 is an apocalyptic number.

It is an amenable number.

61287224 is a deficient number, since it is larger than the sum of its proper divisors (55460776).

61287224 is a wasteful number, since it uses less digits than its factorization.

61287224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 619 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 61287224 is about 7828.6157141605. The cubic root of 61287224 is about 394.2665961765.

The spelling of 61287224 in words is "sixty-one million, two hundred eighty-seven thousand, two hundred twenty-four".