61210072 has 32 divisors (see below), whose sum is σ = 143089920. Its totient is φ = 23847840.

The previous prime is 61210043. The next prime is 61210073. The reversal of 61210072 is 27001216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61210073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49068 + ... + 50299.

It is an arithmetic number, because the mean of its divisors is an integer number (4471560).

Almost surely, 2^61210072 is an apocalyptic number.

It is an amenable number.

61210072 is an abundant number, since it is smaller than the sum of its proper divisors (81879848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61210072 is a wasteful number, since it uses less digits than its factorization.

61210072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99391 (or 99387 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 61210072 is about 7823.6865990401. The cubic root of 61210072 is about 394.1010846306.

Adding to 61210072 its reverse (27001216), we get a palindrome (88211288).

Subtracting from 61210072 its reverse (27001216), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 61210072 in words is "sixty-one million, two hundred ten thousand, seventy-two".