61051057 has 8 divisors (see below), whose sum is σ = 62232872. Its totient is φ = 59875200.

The previous prime is 61051051. The next prime is 61051069. The reversal of 61051057 is 75015016.

It can be written as a sum of positive squares in 4 ways, for example, as 2436721 + 58614336 = 1561^2 + 7656^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61051057 - 2¹⁹ = 60526769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61051051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22957 + ... + 25477.

It is an arithmetic number, because the mean of its divisors is an integer number (7779109).

Almost surely, 2^61051057 is an apocalyptic number.

It is an amenable number.

61051057 is a deficient number, since it is larger than the sum of its proper divisors (1181815).

61051057 is a wasteful number, since it uses less digits than its factorization.

61051057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 61051057 is about 7813.5175817298. The cubic root of 61051057 is about 393.7595159538.

The spelling of 61051057 in words is "sixty-one million, fifty-one thousand, fifty-seven".