70563551 has 4 divisors (see below), whose sum is σ = 72470712. Its totient is φ = 68656392.

The previous prime is 70563539. The next prime is 70563553. The reversal of 70563551 is 15536507.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70563551 - 2⁶ = 70563487 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 (70563553) 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, 953525 + ... + 953598.

It is an arithmetic number, because the mean of its divisors is an integer number (18117678).

Almost surely, 2^70563551 is an apocalyptic number.

70563551 is a deficient number, since it is larger than the sum of its proper divisors (1907161).

70563551 is a wasteful number, since it uses less digits than its factorization.

70563551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907160.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 70563551 is about 8400.2113663883. The cubic root of 70563551 is about 413.2315535181.

The spelling of 70563551 in words is "seventy million, five hundred sixty-three thousand, five hundred fifty-one".