61357213 has 4 divisors (see below), whose sum is σ = 64586560. Its totient is φ = 58127868.

The previous prime is 61357207. The next prime is 61357229. The reversal of 61357213 is 31275316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61357213 - 2⁵ = 61357181 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 (61357313) 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, 1614645 + ... + 1614682.

It is an arithmetic number, because the mean of its divisors is an integer number (16146640).

Almost surely, 2^61357213 is an apocalyptic number.

It is an amenable number.

61357213 is a deficient number, since it is larger than the sum of its proper divisors (3229347).

61357213 is a wasteful number, since it uses less digits than its factorization.

61357213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229346.

The product of its digits is 3780, while the sum is 28.

The square root of 61357213 is about 7833.0845137787. The cubic root of 61357213 is about 394.4166210678.

The spelling of 61357213 in words is "sixty-one million, three hundred fifty-seven thousand, two hundred thirteen".