61512751 has 12 divisors (see below), whose sum is σ = 64247904. Its totient is φ = 58858400.

The previous prime is 61512743. The next prime is 61512769. The reversal of 61512751 is 15721516.

It is not a de Polignac number, because 61512751 - 2³ = 61512743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61512151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142506 + ... + 142936.

It is an arithmetic number, because the mean of its divisors is an integer number (5353992).

Almost surely, 2^61512751 is an apocalyptic number.

61512751 is a deficient number, since it is larger than the sum of its proper divisors (2735153).

61512751 is an equidigital number, since it uses as much as digits as its factorization.

61512751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 531 counting only the distinct ones).

The product of its digits is 2100, while the sum is 28.

The square root of 61512751 is about 7843.0065026111. The cubic root of 61512751 is about 394.7496164627.

It can be divided in two parts, 615 and 12751, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 61512751 in words is "sixty-one million, five hundred twelve thousand, seven hundred fifty-one".