61322751 has 56 divisors (see below), whose sum is σ = 107341344. Its totient is φ = 34292160.

The previous prime is 61322741. The next prime is 61322753. The reversal of 61322751 is 15722316.

It is a happy number.

It is not a de Polignac number, because 61322751 - 2¹⁷ = 61191679 is a prime.

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

61322751 is a modest number, since divided by 322751 gives 61 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61322753) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 311185 + ... + 311381.

Almost surely, 2^61322751 is an apocalyptic number.

61322751 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61322751 is a deficient number, since it is larger than the sum of its proper divisors (46018593).

61322751 is an equidigital number, since it uses as much as digits as its factorization.

61322751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 268 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 61322751 is about 7830.8844328083. The cubic root of 61322751 is about 394.3427643280.

It can be divided in two parts, 613227 and 51, that added together give a triangular number (613278 = T₁₁₀₇).

The spelling of 61322751 in words is "sixty-one million, three hundred twenty-two thousand, seven hundred fifty-one".