77220542 has 16 divisors (see below), whose sum is σ = 133665792. Its totient is φ = 32772600.

The previous prime is 77220527. The next prime is 77220547. The reversal of 77220542 is 24502277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77220547) 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, 25334 + ... + 28217.

It is an arithmetic number, because the mean of its divisors is an integer number (8354112).

Almost surely, 2^77220542 is an apocalyptic number.

77220542 is a deficient number, since it is larger than the sum of its proper divisors (56445250).

77220542 is a wasteful number, since it uses less digits than its factorization.

77220542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53663.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 77220542 is about 8787.5219487635. The cubic root of 77220542 is about 425.8378709599.

The spelling of 77220542 in words is "seventy-seven million, two hundred twenty thousand, five hundred forty-two".