61213072 has 10 divisors (see below), whose sum is σ = 118600358. Its totient is φ = 30606528.

The previous prime is 61213067. The next prime is 61213091. The reversal of 61213072 is 27031216.

It can be written as a sum of positive squares in only one way, i.e., 37748736 + 23464336 = 6144^2 + 4844^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1912893 + ... + 1912924.

Almost surely, 2^61213072 is an apocalyptic number.

It is an amenable number.

61213072 is a deficient number, since it is larger than the sum of its proper divisors (57387286).

61213072 is a wasteful number, since it uses less digits than its factorization.

61213072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825825 (or 3825819 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 61213072 is about 7823.8783221622. The cubic root of 61213072 is about 394.1075230261.

Adding to 61213072 its reverse (27031216), we get a palindrome (88244288).

The spelling of 61213072 in words is "sixty-one million, two hundred thirteen thousand, seventy-two".