751151561 has 4 divisors (see below), whose sum is σ = 755043732. Its totient is φ = 747259392.

The previous prime is 751151551. The next prime is 751151573. The reversal of 751151561 is 165151157.

751151561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165151157 = 41 ⋅4028077.

It can be written as a sum of positive squares in 2 ways, for example, as 413878336 + 337273225 = 20344^2 + 18365^2 .

It is a cyclic number.

It is not a de Polignac number, because 751151561 - 2¹⁸ = 750889417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (751151521) 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, 1945796 + ... + 1946181.

It is an arithmetic number, because the mean of its divisors is an integer number (188760933).

Almost surely, 2^751151561 is an apocalyptic number.

It is an amenable number.

751151561 is a deficient number, since it is larger than the sum of its proper divisors (3892171).

751151561 is a wasteful number, since it uses less digits than its factorization.

751151561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892170.

The product of its digits is 5250, while the sum is 32.

The square root of 751151561 is about 27407.1443423061. The cubic root of 751151561 is about 909.0250642283.

The spelling of 751151561 in words is "seven hundred fifty-one million, one hundred fifty-one thousand, five hundred sixty-one".