61525751 has 4 divisors (see below), whose sum is σ = 70315152. Its totient is φ = 52736352.

The previous prime is 61525727. The next prime is 61525757. The reversal of 61525751 is 15752516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61525751 - 2⁶ = 61525687 is a prime.

It is a super-2 number, since 2×61525751² = 7570836072228002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61525757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4394690 + ... + 4394703.

It is an arithmetic number, because the mean of its divisors is an integer number (17578788).

Almost surely, 2^61525751 is an apocalyptic number.

61525751 is a deficient number, since it is larger than the sum of its proper divisors (8789401).

61525751 is an equidigital number, since it uses as much as digits as its factorization.

61525751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8789400.

The product of its digits is 10500, while the sum is 32.

The square root of 61525751 is about 7843.8352226446. The cubic root of 61525751 is about 394.7774230744. Note that the first 3 decimals are identical.

The spelling of 61525751 in words is "sixty-one million, five hundred twenty-five thousand, seven hundred fifty-one".