50553690 has 64 divisors (see below), whose sum is σ = 133056000. Its totient is φ = 12191040.

The previous prime is 50553649. The next prime is 50553709. The reversal of 50553690 is 9635505.

50553690 = 243² + 244² + ... + 549².

It is a super-2 number, since 2×50553690² = 5111351145232200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101061 + ... + 101559.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^50553690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50553690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66528000).

50553690 is an abundant number, since it is smaller than the sum of its proper divisors (82502310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50553690 is a wasteful number, since it uses less digits than its factorization.

50553690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827.

The product of its (nonzero) digits is 20250, while the sum is 33.

The square root of 50553690 is about 7110.1118134668. Note that the first 3 decimals coincide. The cubic root of 50553690 is about 369.7580351278.

The spelling of 50553690 in words is "fifty million, five hundred fifty-three thousand, six hundred ninety".