51603542 has 4 divisors (see below), whose sum is σ = 77405316. Its totient is φ = 25801770.

The previous prime is 51603523. The next prime is 51603553. The reversal of 51603542 is 24530615.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12900884 + ... + 12900887.

It is an arithmetic number, because the mean of its divisors is an integer number (19351329).

Almost surely, 2^51603542 is an apocalyptic number.

51603542 is a deficient number, since it is larger than the sum of its proper divisors (25801774).

51603542 is a wasteful number, since it uses less digits than its factorization.

51603542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25801773.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 51603542 is about 7183.5605377835. The cubic root of 51603542 is about 372.3001152729.

The spelling of 51603542 in words is "fifty-one million, six hundred three thousand, five hundred forty-two".