61512803 has 4 divisors (see below), whose sum is σ = 67104888. Its totient is φ = 55920720.

The previous prime is 61512779. The next prime is 61512809. The reversal of 61512803 is 30821516.

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 61512803 - 2⁶ = 61512739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61512809) 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, 2796026 + ... + 2796047.

It is an arithmetic number, because the mean of its divisors is an integer number (16776222).

Almost surely, 2^61512803 is an apocalyptic number.

61512803 is a deficient number, since it is larger than the sum of its proper divisors (5592085).

61512803 is a wasteful number, since it uses less digits than its factorization.

61512803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592084.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 61512803 is about 7843.0098176657. The cubic root of 61512803 is about 394.7497276969.

The spelling of 61512803 in words is "sixty-one million, five hundred twelve thousand, eight hundred three".