61351506 has 20 divisors (see below), whose sum is σ = 137473182. Its totient is φ = 20450448.

The previous prime is 61351483. The next prime is 61351519. The reversal of 61351506 is 60515316.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 9641025 = 7191^2 + 3105^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61351506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 189195 + ... + 189518.

Almost surely, 2^61351506 is an apocalyptic number.

61351506 is an abundant number, since it is smaller than the sum of its proper divisors (76121676).

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

61351506 is a wasteful number, since it uses less digits than its factorization.

61351506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378727 (or 378718 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 61351506 is about 7832.7202171404. The cubic root of 61351506 is about 394.4043921038.

The spelling of 61351506 in words is "sixty-one million, three hundred fifty-one thousand, five hundred six".